One day a florist goes to a barber for a haircut. After the cut he asks about his bill and the barber replies, "I'm sorry, I cannot accept money from you; I'm doing community service this week."
The florist is pleased and leaves the shop. Next morning when the barber goes to open up, there is a thank you card and a dozen roses waiting for him at his door.

Later, a cop comes in for a haircut, and when he goes to pay his bill the barber again replies, "I'm sorry, I cannot accept money from you; I'm doing community service this week."
The cop is happy and leaves the shop. Next morning when the barber goes to open up, there is a thank you card and a dozen donuts waiting for him at his door.

Then a Democrat comes in for a haircut, and when he goes to pay his bill the barber again replies, "I'm sorry, I cannot accept money from you; I'm doing community service this week."
The Democrat is very happy and leaves the shop. Next morning when the barber goes to open up, there are a dozen Democrats waiting for him at his door.