A woman is just getting out of the shower when the doorbell rings. Her husband, heading to the shower himself, asks her see who's at the door, so she wraps herself up in a towel and runs downstairs.
When she opens the door, there stands her next-door neighbor, Rob.

Before she can say a word, Rob says, "I'll give you $500 dollars to drop that towel that you have on." After thinking for a moment, the woman drops her towel and stands naked in front of him.
He looks for a few seconds, hands her $500 dollars, and leaves.

Excited about her earnings, the woman puts the towel back on and runs upstairs. Her husband yells out from the shower, "Who was that?"
"It was Rob from next door," she replies.

"Great," the husband says. "Did he say anything about the $500 dollars he owes me?


I've discovered a way to stay friends forever -- 
There's really nothing to it. 
I simply tell you what to do 
And you do it! 
--- Shel Silversein