Lol@ this.
I remember this topic was on GTAforums ages ago.
Yes and Yes.
I usually aim to piss beforehand but if i forget and need to go then I will, but i'll make sure i do it before i wash etc.
NEVER done it right at the end, otherwise it hasn't washed off.
As for the second, i have a few times but for a chick, its harder cause of standing up and all that.
Bed is way easier.