Well there You Go!

Son asks his dad the difference between theoretically and realistically.
Dad says, "Thats hard, but I have an idea, ask your mam would she shag Wayne Rooney for a £1,ooo,ooo. She says 'Yes'.
Ok, now ask your sister. She says 'Yes'.
OK, now you ask your brother. He says 'Yes'.
Well son, there you go thats your answer. Theoretically were sitting on £3,000,000 but realistically were living with two sluts and a queer!