A very old retired sailor put on his old uniform and went down to the docks once more for old times sake. He found a young prostitute and went up into her room with her. He draped his sailor suit across the bed as he got ready for the deed of intent.
A few minutes later found him goin’ at it the best he could for a guy his age and condition. He looked up and asked her, “So, how am I doin’ there, Honey’?”
The prostitute replied, “Well, old sailor, you’re doing about three knots.”
“What’s that?” he asked in confusion…
“Well, mister, as I said, you’re doing ‘three knots.’ You’re knot hard, you’re knot in…and you’re knot getting your money back!” she calmly explained.