"Dad what is the difference between realistically and hypothetically speaking?"

-Well son, go and ask your mom and sister if they would have sex with a stranger for 1 million dollars

-But why dad, how is this going to answer my question?

- Just do it!

After a few minutes the son returns to his dad..

-Hey dad,both said they would accept the 1 million dollars offer for sex

-Therefore son, hypothetically speaking we could have 2 million dollars, but realistically speaking we only have two hookers in the house.