His father looks at him and thinks for a moment and then says to him
'Go and ask your mother if she would sleep with Robert Redford for a £1m and then go and ask your sister if she would sleep with Brad Pitt for £1m'
The young lad goes off rather puzzled but wishing to find the answer goes up to his Mum and asks her if she would sleep with Robert Redford for £1m - 'Would I ever' she replies 'I would be all over him like a rash' he thanks her and then goes and asks his sister if she would sleep with Brad Pitt for £1m - Ooh yes please, he wouldn't be able to walk after I had finished with him'
Having asked them both he goes back to his father with the results.
'Well how did you get on then, did asking those questions help at all'
asks the father.
'Oh yes' replied the young lad, 'I think I understand now, potentially we are sitting on £2m, in reality we are living with a couple of slappers !!!