Piss content was great a year ago. (Fondly thinks about pressing on bladders) Unfortunately, rules have changed on itch.io.
I mean you still can get the Golden Showerer skill. You just have to make sure Watersports enabled in your Content Options. The easiest way to unlock that I've discovered. Using the open stall at the Friday night parties. One of the random events is a drunk guy peeing on you. And if it happens 3 to 4 times you can get the Golden Showerer skill. Which will still allow you to press on people's bladder. To force them to pee on you.