Peeing in the bathtub

A few years back I was talking to a friend of mine, and I don't know how it came up, but she mentioned that she pees in the shower. (I honestly don't remember which friend this was, obviously the topic was more memorable, no offense to whoever she is) As a non-shower-peer this disgusted me, but she insisted that it was normal. So I polled my friends and some acquaintances. There were many like me, who were disgusted by the questions. Others didn't have a problem and confided that they regularly pee in the shower.

Here's the question: is peeing in the bath tub the same thing? (No i haven't taken a bath, and certainly don't pee in one, although I once had a roomie who would pee in the bathtub, when it was empty, if for some reason he didn't feel like going in the toilet, despite t being right next to the tub. In his defense, we he was usually drunk at that point of the night, I am now way off topic, time to right this post)

I usually give Jonah his bath, and there are times that he will pee in the tub (Most of the times he will stand up and pee like a man, but if he's sitting I have no idea if he peed or not) At this point I don't know what to do, Do I take him out of the tub, drain it, refill it and start over? This would make hm cry, cause he hates getting out of the tub. Or do I say compared to hoe much water is in the tub, his urine isn't going to ruin his cleansing process? The problem with this option is I pour the water, quite possibly his pee over him to wash off the soap. It seems like a lose-lose situation for him. here he is trying to get clean and he is as Chandler Bing once said "sitting in a pool of his own filth."

Is it OK to pee in the bath?