Bob the Builder is out on the town and chats up a nice girl at a bar. They seem to be getting along so he asks her to come home with him. Shes says I dunno about that. Bob announces he has a 10" cock and can go all night. She thinks wow I'll have some of that action and so off they go to Bob's place.
They wake up in the morning and she says you are a lying bastard. You've got a 3" cock and you only lasted 2 minutes.
He replied "I am a builder love, it was an estimate".