This one goes to human nature.
Salesman rings doorbell of house in rich part of town.
It's evening, and a 12 year old boy answers the door dressed in a dressing gown with a large glass of Whiskey and Ice in one hand and an expensive Cigar alight in the other.
Salesman: “Excuse me young man , is your father home?”
Boy: Does it F****ing look like it?