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  #1  
Old 02-07-2006, 12:10 AM
Surreal Surreal is offline
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Why Do People Fart When They Pee?

On numerous occasions I've been in a restroom and have heard somebody loudly pass gas while they were in the process of urinating. While I cannot prove any statistical relationship between the two occurances, I've heard far too much farting taking place during the brief urinary interval to believe that they aren't interrelated.

What is the physiologic mechanism by which urinating causes a person to pass gas?

Thanks.
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  #2  
Old 02-07-2006, 12:21 AM
BrainGlutton BrainGlutton is offline
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Said the dowager duchess at tea,
"Young man, do you fart when you pee?"
I replied, "Not a bit!
"Do you belch when you shit?"
Which I'd say left the honours with me!
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  #3  
Old 02-07-2006, 12:41 AM
roger thornhill roger thornhill is offline
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Well you're at it, my wife wants you to tell her why men fart when they enter the bedroom.
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  #4  
Old 02-07-2006, 11:07 AM
butler1850 butler1850 is offline
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I'd say it's two parts.

1) You're relaxing muscles in the lower abdomen, that are related to waste. The fart "leaks" out.

2) The bathroom is the one place that no matter how stinky the fart is, you are actually allowed to let it go there. You're standing around at the urinal anyway, what else do you have to do. It's just a good time to get nice beefy fart in.
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  #5  
Old 02-07-2006, 11:18 AM
AFAIKnow AFAIKnow is offline
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Quote:
Originally Posted by roger thornhill
Well you're at it, my wife wants you to tell her why men fart when they enter the bedroom.
I think this only works if there is only one egress from the bedroom. That way she is trapped and if she tries to flee we can clothes-line her when she tries to run past us in a panic. Still not as good as holding her head under the covers, but they start expecting that after a few times and the shock value wears off.
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  #6  
Old 02-07-2006, 03:06 PM
t-bonham@scc.net t-bonham@scc.net is offline
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There are sphinctor muscles that close both the urinary and anal openings. The nerves controling these are seperate, I believe, but most people have learned (potty training) to control them somewhat together. Notice that most people open both to poop, and can't poop without also peeing?

So when men are opening the urinary sphinctor muscle to pee, they tend to at least loosen the anal one, thus allowing a fart. And, as people mentioned, our culture makes the bathrom an acceptable place for farting, so this behavior is reinforced.
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  #7  
Old 02-07-2006, 03:21 PM
jjimm jjimm is offline
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Quote:
Originally Posted by BrainGlutton
Said the dowager duchess at tea,
"Young man, do you fart when you pee?"
I replied, "Not a bit!
"Do you belch when you shit?"
Which I'd say left the honours with me!
I met that same duchess at tea.
It was just as I feared it would be:
Her noises abdominal
Were truly phenomenal,
And everyone thought it was me.
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  #8  
Old 02-07-2006, 03:53 PM
Jake Jake is offline
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Quote:
Originally Posted by AFAIKnow
I think this only works if there is only one egress from the bedroom. That way she is trapped and if she tries to flee we can clothes-line her when she tries to run past us in a panic. Still not as good as holding her head under the covers, but they start expecting that after a few times and the shock value wears off.
Where I come from this is called a "Covered Wagon"
Heh.
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  #9  
Old 02-07-2006, 04:28 PM
jayjay jayjay is online now
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Quote:
Originally Posted by Jake
Where I come from this is called a "Covered Wagon"
Heh.
"Dutch Oven" around here...
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  #10  
Old 02-07-2006, 06:58 PM
danceswithcats danceswithcats is offline
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It's a guy thing-to let go a magnificent trouser growl in the acoustical environment of a public men's room, then zip up and walk out with a smile on your face because you've done as suggested by Benjamin Franklin: Fart Proudly!
__________________
Crows. Keeping our highways clear of roadkill for over 80 years
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  #11  
Old 02-07-2006, 07:40 PM
Enright3 Enright3 is offline
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Quote:
Originally Posted by jjimm
I met that same duchess at tea.
It was just as I feared it would be:
Her noises abdominal
Were truly phenomenal,
And everyone thought it was me.
Revenge needs just a small chance,
so I humbly asked her to dance
I pulled down her drawers
clean down to the floors
to show she had brown in her pants

OK, that sucked, but it was still fun.
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  #12  
Old 02-07-2006, 11:57 PM
Chotii Chotii is offline
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Quote:
Originally Posted by Jake
Where I come from this is called a "Covered Wagon"
Heh.
I heard of a brand new marriage that ended abruptly with a 'Covered Wagon'....picture a wedding night, and the happy new groom does this to the startled, revulsed, and disgusted new bride. And laughs at her, because "it's a guy thing and it's funny."

End of marriage.

I wish I could remember where I heard about it. Probably the same place I heard about the marriage that was anulled directly after the new groom asked his bride to lie in a bathtub full of cold water for a while, then lie perfectly still on the bed.

Personally, I'd like to know what it is with 'morning farts'. Kids get up, sit on the toilet, brrrrrrrrap. My own digestive system seems to kick into gear when I wake up, too. Very strange. I theorize that while sleeping, the rhythmic movements of the digestive system still, and gas builds up as it always does. But because there is no movement, the gas just sits there until waking creates peristaltic movement. Would I be correct on this?
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  #13  
Old 02-08-2006, 09:56 AM
rainy rainy is offline
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"A leak without a fart is like a wedding without a band."

Famous quote around the office from our financial guy.

-rainy
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  #14  
Old 02-08-2006, 10:01 AM
Ponster Ponster is offline
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Why has no one mentioned women who fart while peeing. Is it a man-only event?
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  #15  
Old 02-08-2006, 10:19 AM
GaryM GaryM is offline
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I like the Google ad for Gulf Hurricane Relief!
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  #16  
Old 02-08-2006, 12:01 PM
Doctor Jackson Doctor Jackson is offline
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Quote:
Originally Posted by Chotti
Personally, I'd like to know what it is with 'morning farts'. Kids get up, sit on the toilet, brrrrrrrrap. My own digestive system seems to kick into gear when I wake up, too. Very strange. I theorize that while sleeping, the rhythmic movements of the digestive system still, and gas builds up as it always does. But because there is no movement, the gas just sits there until waking creates peristaltic movement. Would I be correct on this?
Partially. It has more to do with you being still and hortizontal for a long period of time. Moving around helps the gas work its way through one's system. When you awaken, the act of moving around helps free the gas that has built up naturally over night. That is also the reason that babies need to be burped after a feeding. They don't have enough mobility to help the gas along on their own.

Quote:
Originally Posted by Ponster
Why has no one mentioned women who fart while peeing. Is it a man-only event?
Women don't fart. They can't. They won't keep their mouth shut long enough to build up any back pressure.
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  #17  
Old 02-08-2006, 12:11 PM
Dead Cat Dead Cat is offline
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Quote:
Originally Posted by jayjay
"Dutch Oven" around here...
I believe the latest term is a "Hugo Boss." From their advertising campaign "your fragrance, your rules."
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  #18  
Old 02-08-2006, 01:56 PM
whiterabbit whiterabbit is offline
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Quote:
Originally Posted by Ponster
Why has no one mentioned women who fart while peeing. Is it a man-only event?
Umm...no. Or else I'm some sort of weird anomaly. It's not every time, but quite often.
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  #19  
Old 05-16-2013, 08:48 PM
Justjaden Justjaden is offline
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Ok here is the biological reason... The urinary and digestive system is control by the parasympathetic nervous system. The there two sphincter muscles (termed intern and external) in the urinary tract and at the end of the digestive tract. One is involuntary (internal sphincter) which is under control of the parasympathetic nervous system and one under voluntary (external sphincter) muscle control. The bladder, when full, signals the PSN to to relax the internal sphincter muscle. This CAN also send a signal to the internal sphincter muscle in the rectum which could permit gas to pass freely. The external sphincter muscles, under voluntary control, are consciously relaxed, when they do you can more easily pass gas. If you try to "clench" the anus to prevent farting it can cause most of the lower abdominal muscles to tighten up making it more difficult, and sometimes more painful to pee. So, most men just choose to relax those muscles and pee (and fart) without impediment.
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  #20  
Old 05-17-2013, 10:06 AM
Leo Bloom Leo Bloom is offline
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Do women as often, then?
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  #21  
Old 05-17-2013, 10:19 AM
CC CC is offline
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Quote:
Originally Posted by Enright3 View Post
Revenge needs just a small chance,
so I humbly asked her to dance
I pulled down her drawers
clean down to the floors
to show she had brown in her pants

OK, that sucked, but it was still fun.
There was a young lady from Wheeling
Who had a peculiar feeling.
She laid on her back
And opened her crack
And peed all over the ceiling.

(And then she farted)
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  #22  
Old 05-17-2013, 10:22 AM
April R April R is offline
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Quote:
Originally Posted by t-bonham@scc.net View Post
There are sphinctor muscles that close both the urinary and anal openings. The nerves controling these are seperate, I believe, but most people have learned (potty training) to control them somewhat together. Notice that most people open both to poop, and can't poop without also peeing?

So when men are opening the urinary sphinctor muscle to pee, they tend to at least loosen the anal one, thus allowing a fart. And, as people mentioned, our culture makes the bathrom an acceptable place for farting, so this behavior is reinforced.
That was both grossly descriptive and informative
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  #23  
Old 05-17-2013, 10:45 AM
Fubaya Fubaya is offline
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I think it's evolutionary. We always have a fart on Alert-5, ready to launch at any moment, so when we are at our most vulnerable while peeing, we automatically fire that bastard into the sky to keep you safe from bogeys.
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  #24  
Old 05-17-2013, 12:19 PM
EmilyG EmilyG is offline
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Do zombies fart while peeing?

Do zombies pee at all?
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  #25  
Old 05-17-2013, 01:13 PM
Archaic_Entity Archaic_Entity is offline
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Quote:
Originally Posted by EmilyG View Post
Do zombies fart while peeing?

Do zombies pee at all?
Assuming they're dead, then they've already farted their last fart, and likely shat their last shit.

Their digestive system won't process anymore, although they may bloat. Eventually whatever they eat should distend their bellies enough that it ruptures and all food just goes right out the front.

So... they don't pee. They may make gassy releases but they're not farting in the conventional sense.
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  #26  
Old 05-17-2013, 01:40 PM
Leo Bloom Leo Bloom is offline
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Quote:
Originally Posted by CC View Post
There was a young lady from Wheeling
Who had a peculiar feeling.
She laid on her back
And opened her crack
And peed all over the ceiling.

(And then she farted)
[nitpick]
"She lay on her back."

"Lay" is past tense of "lie," OR
The present tense of a verb with an object, eg "I lay it down."

With your use, someone would've had to have laid her down, or a form of "to be" and would need to be mentioned.

Excursus:
The ambiguity has caused centuries of inappropriate amusement whenever the justly famous and deeply moving soprano aria known as "When I Am Laid" is mentioned. It is from the opera Dido and Aeneas by Henry Purcell. Ordinarily, an aria from an opera is referred to by citing its first words, usually to the first verb. The full phrase is "When I am laid in Earth," which is the way it's sometimes referred to, to avoid the dirty pun. The aria's common name is "Dido's Lament."
[/nitpick]

Last edited by Leo Bloom; 05-17-2013 at 01:43 PM..
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  #27  
Old 05-17-2013, 01:44 PM
clairobscur clairobscur is offline
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I fart in the bathroom (which might be while peeing) in order not to fart in the office, bedroom, etc....
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  #28  
Old 05-17-2013, 01:55 PM
lieu lieu is offline
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It's a little know fact that weary after penning the 2nd law of motion, Newton had to pee and then farted, thus promulgating the 3rd.
SPOILER:
Not really.
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  #29  
Old 05-17-2013, 02:48 PM
DSeid DSeid is offline
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Quote:
Originally Posted by t-bonham@scc.net View Post
There are sphinctor muscles that close both the urinary and anal openings. The nerves controling these are seperate, I believe....
Sure it is a zombie but this deserves a small correction - Branches of the pudendal nerve control both the anal and urinary sphincter. The process of simultanously contracting the bladder or the rectum, most often inclusive of increasing intra-abdominal pressure, while sending the signal to relax one or the other sphincter, often has cross talk to some degree.

On the peds side we see the converse - kids with dysfunctional voiding of the bladder (which can show up as wetting or as urinary tract infections) are also commonly constipated - that is also have dysfunctional rectal emptying. One not getting coordinated well usually results in the other being klutzy too and treating one requires addressing the other if present. (Other issues come into play as well but are not pertinent to this thread.)
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  #30  
Old 05-17-2013, 06:38 PM
Obiwan Salami Obiwan Salami is offline
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Quote:
Originally Posted by Ponster View Post
Why has no one mentioned women who fart while peeing. Is it a man-only event?
Why do women fart after they pee?

They cant shake it so they gotta blow dry...



Sorry guys, I'm delurking after 15 some-odd years of reading this board. I simply could not resist.
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  #31  
Old 05-17-2013, 08:57 PM
Chief Pedant Chief Pedant is offline
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One wonders if, in the intervening years since this question was asked, anyone wanted to know why some people pee when they fart.

Last edited by Chief Pedant; 05-17-2013 at 08:57 PM..
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