So many times it's ridiculous. (Weak bladder problems)
Most embarrassing: 16 years old. I was doing a school project with this girl in my class. She was really popular and I wasn't, so I'd barely even spoken to her before, but I had to go round her house to finish off the project. It was pretty awkward to start with, but then I needed a wee. Knowing my silly weak bladder I went straight to the bathroom but her mum was showering so I just had to wait. I waited absolutely ages and I was really desperate, and eventually I just couldn't hold it any longer. What made it really embarrassing is that her mum came out of the bathroom a few seconds later and said 'oh, you should have just used the other bathroom!'. THEY HAD ANOTHER FREAKING BATHROOM. And it wasn't just a little bit either, it was loads and went all the way down to my socks. It was just so mortifying because I barely knew the girl, and apparently some of my pee that went on the floor left a permanent stain (I don't know if this is true though).