There guy goes to a weight loss clinic and says he needs
to lose 20 lbs.
The receptionist sends him upstairs, where he finds
a beautiful naked woman with a sign that says “If you catch me,
you can screw me.”
An hour later, he emerges, sated and 20 lbs.
lighter.
A month later, he returns and needs to lose 50 lbs.
The receptionist sends him upstairs again,
but this time there are two girls with the same sign.
A day later, he comes out 50 lbs. lighter.
A year later, he returns and needs to lose 100 lbs.
He gets sent upstairs again, where he finds
a huge gorilla with a sign that reads “If I catch you, I screw you.”