Washing your hands after your pee is incredibly stupid if you logically think about it. I don’t know about you, but I don’t go around putting my penis on things throughout the day, but my hands, I do. My hands are far dirtier and germier than my penis is.
If anything, I should wash my hands before I touch my penis. That makes more sense than “make sure to wash your hands after you pee!” Washing after you pee is 100% a psychological trick to make you think you did something good. Unless you’re getting piss all over your hands, you should wash your hands before you piss tbh.