It was self evident to me until I analized the concept with an adult mind. "Civilized people don't do that" is not a reason for not doing a thing. It begs the question, "why not." If there is no answer, then my paradigm shifts and I do the thing, if consequences of doing it enhance my life.
So far they have. 8^>
Funny thing is, when I confessed it to my wife a year ago she said "I know you do." I asked how she knew and she said she can tell by the sound in the shower when I am. Her attitude is "why wouldn't you?" And she means women too!
Okay, I think I got a bead on this: peeing in the shower is adult, not peeing is the shower, not adult. Gotcha.
Uh, pee hasn't trickled or run or gushed down my leg since I was a toddler, or so I'm told. And I'm not in a rush to experience it again any time soon. Oh, maybe the ladies should 'squat'??
Um, I guess pee before you wash up.