a boy and his grandad go into the bookies, the boy says, "grandad? can i put a line on?" his grandad asks him,"can your cock touch your arse son?" to which the boy replies "no grandad" his grandad says "cant put a line on then" .
as they're leaving the boy finds a new scratchcard, he scratches it and it reavels that he's won £10,000, in excitement he tells his grandad, his grandad then offers a split in the winnings, the boy says," grandad, can your cock touch your arse?" his grandad says proudly "yes son, yes it can" to which the boy replies.
"Go f**k yourself then !"