Old Sailor

An old retired sailor puts on his uniform on and heads for the docks once more for ole times sake.

He engages a prostitute and takes her up to a room. He's soon going at it as well as he can for a guy of his age.

Needing some reassurance he asks, "how am i doing?" The prostitute replies, "Well old sailor you!re doing about 3 knots!""3 knots?" he asks "Whats that supposed to mean?"

She says "Your knot hard,your knot in and your knot gettin your money back."