The was an old sailor who felt a little lonely, so he puts on his old sailors uniform and heads down to the docks.
When he arrives he engagaes a lady of the night, and they go off to her room.
Soon he is going at it as best he can for a man of his age, so seeking reassurance he asks
'How am I doing?'
'Well old sailor your doing about 3 knots'
He asks, 'what does that mean?'
'Well she said, your knot hard, your not in, and your knot getting your money back!'
Swearing removed for obvious reasons
Magnum
Future Spaceship Captain............and Saga prospect