Agreed, I take showers in the morning but sometimes I’ll end the night with a really hot bath, it helps my body not hurt in the morning if I’ve been working hard that day. I will take a piss before I get in the tub but I’ll be damned if I don’t almost always pee some while I’m laying in the tub relaxing. It’s never seemed to be anything to give a shit about to me but some people do seem hyper sensitive to that kind of thing. My partner and I have peed while in the bathtub together before and it didn’t gross either of us out. Maybe it would be more gross if our urine was dark yellow or more noticeable beyond feeling the warmth for less than a minute.