I have always said that there are two types of people in the world... Those who pee in the shower and those who lie about it. Hopefully that's true!
There's an article going viral right now from the website I [Effing] Love Science making a case for why we should all pee in the shower. It's because Americans would save 1.3 TRILLION GALLONS of water a year by not flushing the toilet all those times.
But is it gross to pee in the shower? I mean . . . kind of. But pee is pretty clean, so it's fine for it to go down your shower drain. Just wash yourself up well when you're done.