A boy comes home from school and tells his father his homework is to explain the difference between theory and reality......
The father tells his son to go ask his mom if she would sleep with a stranger for 1 million dollars.
The boy returns and says "Mom said she would"
The father replies "Now, go ask your sister the same question"
The boy again returns and says "She said she would too"
To which the father replies.."See son, in theory we are setting on 2 Million dollars, but in reality, we are living with a couple of whores."