I guess this belongs here, since it has to do with masturbation.

Sometimes after I jack off, I'll have to piss. This piss burns. It only happens after jacking off. It doesn't happen that often either. I know it can't be an STD because it did this when i was a virgin. So wtf is up with this?

Fuckin' duh, it always is like that, it's not an STD.

Wait a while to piss after whacking off.

Same shit for me. If I wait a couple hours after jacking it there's no pain, and my pain isn't really a burning type, though it can be, but for me it's hard to get started pissing. It's like my piss valve is open, but nothings flowing. I blame it on my dick being clogged with semen still. Once it starts it's fine, like I said the occasional burning.

Pissing after you cum is fantastic. Bonus points if you're still inside her when you start...

But in all seriousness, I've had "the burn" happen on a few occasions, but it's really rare, and I can't be completely sure that it's not just my gonorrhea flaring up.

Contracted urethra after ejaculation being forced to make way for urine?

Bonus points if you're still inside her when you start...
.

you just made my day

Or... Piss before you rub it off?

Well, if I even have to piss afterward my dick starts to burn.

Alright heres a piece of advice I received a while ago.

If its burning while your churning...Go see a fucking doctor!

I've had this happen occasionally. I think that if you have to pee and hold it to jerk off then pee afterwards it will burn. That's my hypothesis anyway.

Try to pee before you beat it.

probly a urinary tract infection.

It sucks your supposed to take sipricol or somethin like that.

Or you have to wait a while to piss, or things are fucked up.

This happens because you aren't supposed to piss inside your girl's pussy, so the "valve" shuts the piss tubes off, and activates the spoof tubes.

its the valve in your cock that separates the seamen from the urine
when you piss after you jizz it pushes past the flap when its still up thus the burning sensation
wait like 20 mins after you splooge and it'll be ok