# What's This Vapor Coming Out Of My Anus? **URL:** \ **Category:** Factual Questions\ **Created:** [January 20, 2009, 4:06am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092 "2009-01-20T04:06:17Z")\ **Posts on this page:** 18\ **Page:** 2
**Author:** ![Acid\_Lamp](https://avatars.discourse-cdn.com/v4/letter/a/d6d6ee/32.png) [@Acid\_Lamp](https://boards.straightdope.com/u/Acid_Lamp)\ **Post date:** [January 20, 2009, 7:05pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/21 "2009-01-20T19:05:50Z")
Grundelium gas. ---
**Author:** ![Duckster](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/duckster/32/1244_2.png) [@Duckster](https://boards.straightdope.com/u/Duckster)\ **Post date:** [January 21, 2009, 3:35am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/22 "2009-01-21T03:35:16Z")
Did you perform this inspection with an open flame? ---
**Author:** ![Belowjob2.0](https://avatars.discourse-cdn.com/v4/letter/b/b9e5f3/32.png) [@Belowjob2.0](https://boards.straightdope.com/u/Belowjob2.0)\ **Post date:** [January 21, 2009, 3:55am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/23 "2009-01-21T03:55:33Z")
Ball sweat getting you down? Undone by those awful brown spots? Crud Light. Anal pantyliners for men. At fine stores everywhere. ---
**Author:** ![crypto](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@crypto](https://boards.straightdope.com/u/crypto)\ **Post date:** [January 21, 2009, 4:10am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/24 "2009-01-21T04:10:24Z")
this is the funniest GQ thread I’ve read in a long time! Thanks, **Cervaise** … sorry about your anal-leakage/sack sweat… have you checked your skivvies for the magic dew hole? ---
**Author:** ![Manduck](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/manduck/32/256_2.png) [@Manduck](https://boards.straightdope.com/u/Manduck)\ **Post date:** [January 21, 2009, 4:27am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/25 "2009-01-21T04:27:07Z")
> [@Hazle\_Weatherfield](#): > > Whoops, I’m hoping that was a whoosh! No, he said it happened whether or not he farted. ---
**Author:** ![Surreal](https://avatars.discourse-cdn.com/v4/letter/s/eada6e/32.png) [@Surreal](https://boards.straightdope.com/u/Surreal)\ **Post date:** [January 21, 2009, 6:22am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/26 "2009-01-21T06:22:03Z")
Thanks. I ran some covert experiments at work today per the suggestions above. My findings thus far are as follows: 1. No one else’s chairs displayed any signs of anal fogging, even after remaining seated for long periods of time. 2. My forearms did not seem to produce any fogging effect. 3. Placing a cupped hand on the chair did produce some fogging around the perimeter, but nowhere near the amount that seems to be coming from my anus. 4. It looks like the spots originate from directly behind the scrotum. I’ve heard that the scrotum has the highest permeability of any external body part, so I’m thinking that this might be the source of the moisture. ---
**Author:** ![Joey\_P](https://avatars.discourse-cdn.com/v4/letter/j/919ad9/32.png) [@Joey\_P](https://boards.straightdope.com/u/Joey_P)\ **Post date:** [January 21, 2009, 1:18pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/27 "2009-01-21T13:18:37Z")
> [@Surreal](#): > > 1. It looks like the spots originate from directly behind the scrotum. I’ve heard that the scrotum has the highest permeability of any external body part, so I’m thinking that this might be the source of the moisture. Maybe it’s your pants, you should probably try it without your pants on. ---
**Author:** ![Wiltshire](https://avatars.discourse-cdn.com/v4/letter/w/ea5d25/32.png) [@Wiltshire](https://boards.straightdope.com/u/Wiltshire)\ **Post date:** [January 21, 2009, 2:03pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/28 "2009-01-21T14:03:50Z")
> [@Joey\_P](#): > > Maybe it’s your pants, you should probably try it without your pants on. Aw. The 8th annual [No Pants! Subway Ride](http://improveverywhere.com/missions/the-no-pants-subway-ride/) was _last_ week. ---
**Author:** ![HumanMonkeyGod](https://avatars.discourse-cdn.com/v4/letter/h/c67d28/32.png) [@HumanMonkeyGod](https://boards.straightdope.com/u/HumanMonkeyGod)\ **Post date:** [January 21, 2009, 3:08pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/29 "2009-01-21T15:08:44Z")
I get this too, often on plastic waiting-room type chairs, with darker chairs being more incriminating (if it seems someone else is going to immediately take my seat after I get up, I kind of slide/wipe my ass along the seat as I get up to try and hide it). I remember the first time I noticed it, I frantically ran to the bathroom thinking I’d gotten a case of really really bad diarrhea, so bad that I’d started dribbling without even noticing. I suspect it’s condensation from particular relative humidity conditions. ---
**Author:** ![Bosda\_Di\_Chi\_of\_Tricor](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bosda_di_chi_of_tricor/32/16845_2.png) [@Bosda\_Di\_Chi\_of\_Tricor](https://boards.straightdope.com/u/Bosda_Di_Chi_of_Tricor)\ **Post date:** [January 21, 2009, 10:12pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/30 "2009-01-21T22:12:26Z")
Lay down some white paper on a chair. Examine it minutely. ---
**Author:** ![Happy\_Lendervedder](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/happy_lendervedder/32/8488_2.png) [@Happy\_Lendervedder](https://boards.straightdope.com/u/Happy_Lendervedder)\ **Post date:** [January 21, 2009, 10:17pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/31 "2009-01-21T22:17:36Z")
I suggest tasting the spot. ---
**Author:** ![melodyharmonius](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/melodyharmonius/32/21310_2.png) [@melodyharmonius](https://boards.straightdope.com/u/melodyharmonius)\ **Post date:** [January 21, 2009, 10:40pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/32 "2009-01-21T22:40:22Z")
okay - how flat is your butt that your anus is that close to the seat? Are these seats flat? Or do the have the butt mold for comfort, thus creating a tighter seal? ---
**Author:** ![notfrommensa](https://avatars.discourse-cdn.com/v4/letter/n/f14d63/32.png) [@notfrommensa](https://boards.straightdope.com/u/notfrommensa)\ **Post date:** [January 21, 2009, 11:00pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/33 "2009-01-21T23:00:41Z")
My guess is the vapor from Uranus is comprised of 82.5% Hydrogen, 15.2% Helium and 2.3% Methane with trace amounts of other elements and compounds. ---
**Author:** ![crypto](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@crypto](https://boards.straightdope.com/u/crypto)\ **Post date:** [January 22, 2009, 2:14am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/34 "2009-01-22T02:14:09Z")
just to clarify… The thanks to Cervaise was for the link. My question of undie checking was meant for Surreal. Still laughing, though ---
**Author:** ![Munch](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/munch/32/5281_2.png) [@Munch](https://boards.straightdope.com/u/Munch)\ **Post date:** [January 22, 2009, 3:21am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/35 "2009-01-22T03:21:47Z")
You know, I get this too. It’s a distinct butt-crack line of sweat condensation. Did you shower that day, or does that have no effect? Do you have any Gold Bond? Maybe that could be another variable to throw in there. ---
**Author:** ![BellRungBookShut-CandleSnuffed](https://avatars.discourse-cdn.com/v4/letter/b/bcef8e/32.png) [@BellRungBookShut-CandleSnuffed](https://boards.straightdope.com/u/BellRungBookShut-CandleSnuffed)\ **Post date:** [January 22, 2009, 8:08am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/36 "2009-01-22T08:08:16Z")
> [@FriarTed](#): > > I thought “choad” was another term for penis, as in “choad smoker”, not for the perineum (?), or the more dignified “taint”. > > And I know a whole lot of people just had Mr. Show flashbacks! I did! Yeah, but it’s not just any penis. A choad is a short, wide penis. Some would extend this to only include penises wider than they are long. ---
**Author:** ![bat312](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@bat312](https://boards.straightdope.com/u/bat312)\ **Post date:** [January 22, 2009, 8:47am UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/37 "2009-01-22T08:47:54Z")
1. It looks like the spots originate from directly behind the scrotum. I’ve heard that the scrotum has the highest permeability of any external body part, so I’m thinking that this might be the source of the moisture. [/QUOTE] Exactly where did you hear that? 😕 ---
**Author:** ![Bosda\_Di\_Chi\_of\_Tricor](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bosda_di_chi_of_tricor/32/16845_2.png) [@Bosda\_Di\_Chi\_of\_Tricor](https://boards.straightdope.com/u/Bosda_Di_Chi_of_Tricor)\ **Post date:** [January 22, 2009, 10:54pm UTC](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092/38 "2009-01-22T22:54:04Z")
> [@bat312](#): > > 1. It looks like the spots originate from directly behind the scrotum. I’ve heard that the scrotum has the highest permeability of any external body part, so I’m thinking that this might be the source of the moisture.[ > > Exactly where did you hear that? 😕 And, why did you keep listening?:eek: [Previous page](https://boards.straightdope.com/t/whats-this-vapor-coming-out-of-my-anus/482092.md?page=1)