Lesson 1:
A man was getting into the shower just as his wife was finishing up her shower,
when the doorbell rang.
The wife quickly wrapped herself in a towel and ran downstairs.
When she opened the door, there stood Bob, the next-door neighbour.
Before she could say a word, Bob said, 'I'll give you $800 to drop that towel.'
After thinking for a moment, the woman dropped her towel and stood naked in
front of Bob, after a few seconds, Bob handed her $800 and left.