# Anatomy: why is it hard for a man to pee shortly after ejaculation? **URL:** \ **Category:** Factual Questions\ **Created:** [September 9, 2013, 2:56am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385 "2013-09-09T02:56:37Z")\ **Posts on this page:** 19\ **Page:** 2
**Author:** ![Chronos](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chronos/32/134_2.png) [@Chronos](https://boards.straightdope.com/u/Chronos)\ **Post date:** [September 9, 2013, 5:12pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/21 "2013-09-09T17:12:25Z")
I question the premise. I’ve never had any difficulty peeing shortly after ejaculating. In fact, I sometimes find it easier to do so, in cases where I didn’t feel any particular bladder pressure before ejaculation. ---
**Author:** ![GusNSpot](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/gusnspot/32/436_2.png) [@GusNSpot](https://boards.straightdope.com/u/GusNSpot)\ **Post date:** [September 9, 2013, 5:27pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/22 "2013-09-09T17:27:39Z")
If you are both just enjoying the after glow while still joined and you had to pee somewhat badly, not doing it in the woman is probably a good thing. Well unless you are kinky in that way. YMMV ---
**Author:** ![nearwildheaven](https://avatars.discourse-cdn.com/v4/letter/n/90db22/32.png) [@nearwildheaven](https://boards.straightdope.com/u/nearwildheaven)\ **Post date:** [September 9, 2013, 5:29pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/23 "2013-09-09T17:29:15Z")
> [@yoyodyne](#): > > The bladder neck muscles autonomically contract during ejaculation to prevent semen from going into the bladder instead of out the urethra. It just take a little while to relax. And they also prevent a man from urinating at the time, too. ---
**Author:** ![nearwildheaven](https://avatars.discourse-cdn.com/v4/letter/n/90db22/32.png) [@nearwildheaven](https://boards.straightdope.com/u/nearwildheaven)\ **Post date:** [September 9, 2013, 5:30pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/24 "2013-09-09T17:30:33Z")
> [@Joey\_P](#): > > What happens after ejaculation is kinda irrelevant. Not for women, it isn’t. ---
**Author:** ![johnpost](https://avatars.discourse-cdn.com/v4/letter/j/f17d59/32.png) [@johnpost](https://boards.straightdope.com/u/johnpost)\ **Post date:** [September 9, 2013, 5:42pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/25 "2013-09-09T17:42:00Z")
it is a sign you need to come again. empty one tank then the other. ---
**Author:** ![JFLuvly](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@JFLuvly](https://boards.straightdope.com/u/JFLuvly)\ **Post date:** [September 9, 2013, 7:28pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/26 "2013-09-09T19:28:25Z")
> [@](#): > > IIRC, the real premise was to prevent the flow of Urine once excited, as urine can kill sperm (due to acidity?) - thats the purpose of ‘pre-ejaculate’ (clean the pipes), etc. > > So, it follows that keeping it clamped afterwards is just an extension of that This ---
**Author:** ![vertigo220](https://avatars.discourse-cdn.com/v4/letter/v/d6d6ee/32.png) [@vertigo220](https://boards.straightdope.com/u/vertigo220)\ **Post date:** [June 4, 2015, 12:11am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/27 "2015-06-04T00:11:30Z")
> [@DrFidelius](#): > > Thus, post-ejaculation urine clamp is selectively neutral, as it occurs after the male has bred. Now, if PEUC causes men to die before their children reach breeding age themselves, it might be selected against. But if, as I said, no one has ever died for not being able to take a leak for a few minutes after ejaculation, it cannot be selected against. I hate to revive such an old thread, but I just had to respond to this. You do realize that procreation usually takes more than one or even a few tries, and the more the better in the sense of spreading genes. First, even if this mechanism indeed only had a post-coitus effect that wouldn’t make it selectively neutral. If the lack of such a mechanism increased the risk of death, possibly due to bladder infection or even causing it to fill with semen over time, then the male would get much fewer opportunities to copulate. This would therefore cause him to be selected against compared to someone with this mechanism. Second, if this is indeed due to contraction of the urethral sphincter muscles to prevent semen from getting into the bladder, then by definition it is not a “post-ejaculation” event nor does it occur “after the male has bred,” so your entire selectively neutral argument is invalid. ---
**Author:** ![eschereal](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/eschereal/32/18939_2.png) [@eschereal](https://boards.straightdope.com/u/eschereal)\ **Post date:** [June 4, 2015, 12:17am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/28 "2015-06-04T00:17:10Z")
It helps to pull out first. ---
**Author:** ![CraterLayer](https://avatars.discourse-cdn.com/v4/letter/c/87869e/32.png) [@CraterLayer](https://boards.straightdope.com/u/CraterLayer)\ **Post date:** [June 4, 2015, 2:59am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/29 "2015-06-04T02:59:42Z")
From experience in my younger years: When i’d wake up with a full bladder demanding to be emptied, and and partner wanting sex, I’d of course chose the latter. After the sex, I could immediately urinate heavily, but og was I in pain from the tip of my penis to my prostrate for hours afterward. ---
**Author:** ![CraterLayer](https://avatars.discourse-cdn.com/v4/letter/c/87869e/32.png) [@CraterLayer](https://boards.straightdope.com/u/CraterLayer)\ **Post date:** [June 4, 2015, 3:05am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/30 "2015-06-04T03:05:01Z")
From experience in my younger years: When i’d wake up with a full bladder demanding to be emptied, and and a female partner wanting sex, I’d of course chose the latter. After the sex, I could immediately urinate heavily, but og was I in pain from the tip of my penis to my prostrate for hours afterward. I always wondered what was up with that, and after about the twelfth time I learned it pays to get up and pee first. ---
**Author:** ![CraterLayer](https://avatars.discourse-cdn.com/v4/letter/c/87869e/32.png) [@CraterLayer](https://boards.straightdope.com/u/CraterLayer)\ **Post date:** [June 4, 2015, 3:18am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/31 "2015-06-04T03:18:45Z")
Sorry for the double post, I thought it was an edit. Admin, please remove the first? ---
**Author:** ![MikeF](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@MikeF](https://boards.straightdope.com/u/MikeF)\ **Post date:** [June 4, 2015, 6:47pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/32 "2015-06-04T18:47:27Z")
Just out of curiosity, how does one stumble upon such an old thread? ---
**Author:** ![jharvey963](https://avatars.discourse-cdn.com/v4/letter/j/54ee81/32.png) [@jharvey963](https://boards.straightdope.com/u/jharvey963)\ **Post date:** [June 4, 2015, 11:49pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/33 "2015-06-04T23:49:38Z")
Regarding the PEUC, if my experience is any hallmark, the PEUC diminishes substantially with age. The “post ejaculatory” period has shrunk considerably (:D) as I’ve gotten older. J. ---
**Author:** ![eschereal](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/eschereal/32/18939_2.png) [@eschereal](https://boards.straightdope.com/u/eschereal)\ **Post date:** [June 4, 2015, 11:53pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/34 "2015-06-04T23:53:47Z")
> [@MikeF](#): > > Just out of curiosity, how does one stumble upon such an old thread? It was less than 2 years old, we have had resurrections much more stunning than that. ---
**Author:** ![Sicks\_Ate](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@Sicks\_Ate](https://boards.straightdope.com/u/Sicks_Ate)\ **Post date:** [June 5, 2015, 12:11am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/35 "2015-06-05T00:11:56Z")
Because I’ve already peed all over my partner. Not really, honey. ---
**Author:** ![LawMonkey](https://avatars.discourse-cdn.com/v4/letter/l/d6d6ee/32.png) [@LawMonkey](https://boards.straightdope.com/u/LawMonkey)\ **Post date:** [June 5, 2015, 12:13am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/36 "2015-06-05T00:13:26Z")
Interesting, **CraterLayer**. I’ve got a similar thing, though it’s more like “urinating any time right before or right after ejaculating risks, but doesn’t guarantee, some serious burny times.” Never thought much of it, other than to occasionally have to remind myself about it. I figured it had something to do relative pHes of urine and semen, but that was totally just a WAG. I also assumed it was something everyone experienced, until I mentioned it to a partner; he was rather concerned, but as it was something I’d experienced since I first figured out masturbation, I was pretty sure it wasn’t a VD. Anyway, I’m mildly curious enough to write this post. ---
**Author:** ![CraterLayer](https://avatars.discourse-cdn.com/v4/letter/c/87869e/32.png) [@CraterLayer](https://boards.straightdope.com/u/CraterLayer)\ **Post date:** [June 5, 2015, 2:17am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/37 "2015-06-05T02:17:59Z")
Lawmonkey, you’re right, the pain I felt was also burning. ---
**Author:** ![RadicalPi](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/radicalpi/32/9806_2.png) [@RadicalPi](https://boards.straightdope.com/u/RadicalPi)\ **Post date:** [June 6, 2015, 3:21am UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/38 "2015-06-06T03:21:22Z")
> [@LawMonkey](#): > > Interesting, **CraterLayer**. I’ve got a similar thing, though it’s more like “urinating any time right before or right after ejaculating risks, but doesn’t guarantee, some serious burny times.” Never thought much of it, other than to occasionally have to remind myself about it. I figured it had something to do relative pHes of urine and semen, but that was totally just a WAG. I also assumed it was something everyone experienced, until I mentioned it to a partner; he was rather concerned, but as it was something I’d experienced since I first figured out masturbation, I was pretty sure it wasn’t a VD. > > Anyway, I’m mildly curious enough to write this post. I’m curious enough to quote it. ---
**Author:** ![Mangosteen](https://avatars.discourse-cdn.com/v4/letter/m/6a8cbe/32.png) [@Mangosteen](https://boards.straightdope.com/u/Mangosteen)\ **Post date:** [June 6, 2015, 10:23pm UTC](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385/39 "2015-06-06T22:23:43Z")
> [@CraterLayer](#): > > From experience in my younger years: When i’d wake up with a full bladder demanding to be emptied, and and a female partner wanting sex, I’d of course chose the latter. After the sex, I could immediately urinate heavily, but og was I in pain from the tip of my penis to my prostrate for hours afterward. I always wondered what was up with that, and after about the twelfth time I learned it pays to get up and pee first. Why not take a minute and pee first? Is she going to go somewhere? Will she suddenly be not in the mood anymore, develop a headache? I would think that a body with an empty badder would function better thus improving the over all experience. [Previous page](https://boards.straightdope.com/t/anatomy-why-is-it-hard-for-a-man-to-pee-shortly-after-ejaculation/668385.md?page=1)