Besides the odd rug burn, I did have some "zipper trouble". It was about a month ago. My girlfriend and I hadn't been able to get together for awhile, we were having lunch in a park, and one thing led to another. I go comando in the summertime, so she had just pulled my shorts down and we were going at it. I thought I felt something a little sharp, but there was no way I was going to stop. Afterwards we noticed a small cut on my dick from the zipper tab on my shorts. It wasn't too bad, but it did take a couple of days to heal. Now I wear basketball short (with a drawstring) when we get together. ;) lol