[Evans, Marv]

An old retired sailor, puts on his old uniform and heads for the docks once more, for old times sake and some hot sex.

He engages a lovely prostitute and takes her up to a room.

He's soon going at it as well as he can for a guy his age, but needing some reassurance, he asks, 'How am I doing?'

The prostitute replies, 'Well Norman, ya old sailor, you're doing about three knots.'

'Three knots?' he asks. ' What's that supposed to mean?'

She says, 'You're knot hard, you're knot in, and you're knot getting your money back.