Hmmmmm. I dont have any real funny stories about myself. Closest thing I can come up with somewhat related was:

Several years ago I meet this chick through a friend. The girl and I hit it off real quick and we start joking around with my friend to do various 'things'.

It started off by daring him to stick a Q-tip in his dick (ouch)... He actually did it which was funny to see but the kicker was when we dared him to masturbate outside in her front yard. LoL

I think it was sometime in the winter cause I remember it was cold... The dude proceeds to whack off in this chick drive-way with one hand while smoking a cig with the other... Me and this girl are laughing our ASSES off and right when we turn to look at him to laugh more the dude 'cums' all over the basketball post

Ok, it was one of those things you had to be there!