From my experience with men, they can pee with erections (like in the morning), but it’s very difficult and uncomfortable, and they usually have to wait for it to die down a bit. But peeing at the point of orgasm is something I’ve never seen nor has any man I’ve known/been with has ever talked about.
This shows how much I know about men: I thought if they orgasmed, they couldn’t pee at the same time.
I went to Go ask Alice and she answered this for someone else:
Everything they write is fiction 101.