This Will Take Might Of Steel
Harry is 85 when he gets married to a 22-year-old. One night after his honeymoon he shows up at the local bar where all the guys want to hear about his wedding night.
"Well," Harry tells them, "We got to the hotel and my youngest son helped me out. First he carried me up the stairs. Then he helped me get undressed. Finally he lifted me onto the bed with my bride, so's me and her could spend the night together. The next morning all three of my sons came upstairs and lifted me off her."
One of his buddies asks him, "Why did it take your three sons to lift you off?"
Harry says, "'Cause I fought 'em."