Ralph, an old retired sailor, puts on his old uniform and heads for the docks
in Dartmouth 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 Ralph, 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.'