The 10 year old kid asks his father what the difference between theory and reality is.
The father answers: It would be easier to explain this if we made a little experiment, go ask your sister if she would fuck a man she had never seen before for 10 grand.

The boy did as told and went and asked his teenage sister the question, she thought a while and then answered yes, that she probably would. The boy returns to the father with the answer and the father says: Now go and ask your mother the same question. The boy does as told and asks his mother the same question. She is silent for a long time and then says, that yes, she probably would.

The boy returns to the father with the reply, and the father nods, then asks: And you my son? would you fuck a man you've never seen before for 10 grand.

The boy hesitates and then answers yes.

The father nods...

And then sadly proclaims: Here is the difference, in theory, I have a wife, a daughter and a son, but in reality I have two whores and a little fag.