Three boys are sitting around the lunch table at school. The first one says, "My dad's a lawyer. People pay him $200 just to write a letter."
The second boy says, "My dad's a doctor. He writes prescriptions on a little sheet of paper and people pay him $300 for it."
The third boy replies, "My dad's a preacher. He writes a few notes on a napkin, tells everyone what he wrote, and it takes eight people to collect all the money."