Little John approached his father one day.
"Dad" he started. "What's the difference between supposedly and in fact?" His dad looks over his newspaper and ponders upon this for a minute.
"Why don't you go to your sister and ask if she would have sex with the neighbour's son for a million dollars?"
Little John doesn't understand what this has to do with his questions, but shrugs and goes to his older sister. He comes back after a short while.
"Yes father, she would!"
Dad nods absentmindedly, not looking up from his newspaper this time.
"Then why don't you go to your mother and ask her if she would have sex with the neighbour for a million dollars?"
Little John still doesn't understand where this is leading towards, but he goes and asks his mother.
"Yes father, she would!"
Dad turns a page, still reading, and nods.
"Well, you see son, we're supposedly rich, when in fact we have two whores under our roof".