I used to work in NYC and went to the Y on my lunch hour to swim laps. One day, I was sharing a lane with this dude, and a couple of times he swam by me, no problem. Then another time, I felt something on my butt. Hmm. Maybe it was an accident. Then I felt it again. The third time he tried, I stopped swimming, grabbed him around the neck and started punching him in the face and called him every bloody name in the book. Everyone stopped and was starring at us, but I didn't give a crap at this point. Man, was I steamed. He got out of the pool and left.