Bored During Lunch
Three co-workers are bored during their lunch break, so they decide to go to the roof of their building and have a contest of whose dick is the biggest.
The first guy drops his and it rolls all the way down and stops at the first floor. The second guys says "I can beat that," and drops his and it rolls all the way down and hits the sidewalk. The third guy seeing this says "I'm not really sure I wanna do this."
After some prodding by the other two he finally says, "Ok, I'll do it if you guys promise not to laugh."
They agree and he pulls his out and drops it and it rolls all the way down to the sidewalk and rolls across the street! The other two guys start laughing and the third guys says "I though you guys weren't gonna laugh?
What's so funny"?
His two co-workers said "We're not laughing at the size of it, we're laughing at the truck getting ready to run it over."