An old retired sailor puts on his uniform and heads 4 the docks once more 4 ole times sake. He engages a prostitute and takes her up 2 his room. hes soon going at it as well as he can 4 a guy of his age, but needing some reassurance, he asks, ‘how am i doing’? The prostitute replies ‘Well old sailor your doing about 3 knots!’ 3 knots? he asks, whats that supposed 2 mean? She says ‘Your knot hard, your knot in n your not getting your money back!