too many times to count, not to mention getting hit by other means as well (soccer balls, tennis balls, etc) Plus, what's it called when someone coems up to you and just raps in your nads with a backhanded slap... got a few of those back in high school... I can remember once me and two friends were standing around talking after school, and my one friend hits the other like that, and then backed away. In order tot ake out his frustration, my other "friend" (actually I hate the kid, and this justifies my feelings) turns to me and hits me in the groin as hard as he can. There was a 2-second pause where I was like "WTF?" and then bam! I as on the floor, curled up, unable to move. People started crowding around asking "Is he all right?" and trying to talk to me, but I couldn't even answer. The pain overwhelmed everything else. I couldn't move for a good 15 minutes, and then I had to hobble over to a bench and sit there for another 15 minutes until I felt better.
Note to girls: if you still think hitting a guy in the nads is funny, take this to heart: it is the worst pain ever. childbirth is probably about the same, but I would imagine it can't match the sick-to-your-stomach, innards writhing in pain and nausea feeling we get when we get hit there.