Jacob Levy had just finished his loan collecting for the week and had done very well, so he thought he would give himself a justly deserved reward and went to a well known brothel.
The madam said "Well, you can have this nice Chinese girl over there for $5, then I have a redhead for $10 and this terrific blonde for $15."
Jacob decided to spend $10 and have a really good time.
More than 20 years later his wife had died and he felt lonely so once again he went to the brothel. He recognized the redhead who was now a madam, and there was a friendly reunion. Suddenly a huge youngster of about 20 years old appeared and called out "Mum, is this guy bothering you?"
"No,No," said the madam, "In fact, John, I'd like you to meet your father."
"What?", said John, "This little Jewish man is my father?", to which Jacob replied "Watch your manners! If I hadn't been so generous you would have been a chinaman!"