Here's another one. I couldn't include it with the first post, because it would be too long.
Small World
A man and his buddy are playing behind a slow twosome of females, when one accidentally hits into them. He proceeds to go up and apologize, but halfway there he immediately turns around and heads back to his partner. "Dude, what happened?" says the buddy. "Man, that's my wife AND my mistress" says the first guy. "Alright", says the buddy, "I'll go apologize for you, but you owe me." Halfway to the group the buddy turns around and heads back to his partner, and says "Small world, isn't it."