I think it's a psycological thing.
42 had a bent crank and had to try everything to prove it still worked..sort of.
Kerry, unless he did the Rockefeller, got a limp stick after the prostrate operation; so, he's try to buck up his self-esteem.
Even their mutual hero had his sex life described as the sexiest MINUTE in a girl's life.
Common thread here. The power of position does not make up for a limp dipstick.