Oh there's so many.
One that springs to mind is when I was 16 and on a date with a super hot guy that I'd met in a club the week before (you know, back in the nineties, when underage drinking was fine).
He was 21 and a teacher. Not only that but he had a wicked Fiesta. I was in awe. He picked me up and we went for a couple of drinks in town. I still remember what I was wearing: a cord dugaree style skater dress, tights and spice girl-esque trainers. I'm not sure what happened, normally I'm fully continent but after one drink we were walking along holding hands towards another pub. Suddenly, with no warning, I pissed myself. To this day I'm not sure why that happened.
Anyway, I brazened it out, my legs were chafing a bit under my opaque tights though. in the next pub I went and mopped up the worst of it with bog roll, but my knickers, tights and spice girl trainers were soaked in piss.
He gave me a lift home, all the while me being horribly aware that my damp arse was soaking into the upholstery of his fiesta. He ended up coming in and I nipped straight upstairs and got changed, offering no explanation. We ended up at it on my parents living room floor, then he said his goodbyes.
He never called. I'm convinced it's because I made his car smell of wee.