A impoverished brother and sister are trying to come up with ways to make a few extra bucks.

A impoverished brother and sister are trying to come up with ways to make a few extra bucks.

The sister says "I'm going down to give blood. I hear they'll pay $20."
"Wow," says brother, "I'm going to go donate sperm, I hear that pays $100."
The sister angrily leaves the homeless shelter.
The next day the brother seeing his sister leaving the homeless shelter he asks, "where are you headed to?"
"Sperm bank," she says with her mouth full.