When I'm really busting to pee I always get really hard. It's one of my (many) fantasies to be in someone's house (obviously someone also into peeing) and they tell me "I'm really sorry but the toilet is out of action. Go on, just do a wee on the floor right here". Hasn't happened yet but the thought makes me so hard!
I love pissing where I'm not supposed to. It makes me so very wet. I've actually pissed on the floor of the bathroom went in the other stall to hear others reactions. Some were like ewwww... others joined my puddle and did the same thing I was so horny I masturbated in the stall.