I never had an issue with using the men's restroom (as long as they're clean; I guess that means I have issues only half the time

), but I need a stall. I'm simply unable to urinate standing, for some reason. It's usually not a problem in restrooms, but humiliating if on a road trip and asked to "just go outside the car" and so on. The worst episode I can remember was during a week-long class trip in middle school. The bus driver only allowed girls into the bus lavatory, and told the boys to urinate when we stopped for breaks. One day, after a few hours of driving I needed to go badly, so I told him I'm unable to urinate standing and asked if I couldn't use the lavatory. He just laughed, denied my request and said "if you can't pee standing, you're not a real boy".
Exactly. When we finally reached the destination a few hours later, my bladder felt like it could rupture at any moment. I still have a phobia against long bus rides

.