HOW NOT TO EARN $1000

A man is getting into the shower just as his wife steps out of it.
The door bells ring.
After a few seconds of arguing over who should go and answer the doorbell, the wife gives up, wraps herself up in a towel and runs downstairs.
When she opens the door, there stands Bob, the neighbour.

Bob says,"I'll give you $1000 to drop that towel that you have on."

After thinking for a moment, the woman drops her towel.
Bob then hands her $1000 and leaves.
Confused but excited about her good fortune, the woman wraps herself in the towel again and goes back to the bathroom.

Her husband asks, "Who was that?"

She replies:"Bob from the next door."

"Great,"the husband says."Did he say anything about the $1000 he owes me?"