The Seinfeld Sex Dictionary

Backed Up - Glandular condition that men get from not having sex.
Bad Breaker Upper - Someone who ends a relationship by saying those mean things that people don't mean, but means them.
Home Bed Advantage - The confident feeling one gets while making love in one's own surroundings.
"It didn't take" - George's explanation for Susan's short-lived experimentation with lesbianism.
The "It's-not-you-it's-me" routine - Breakup method to which George lays claim.
Love - A spice with many tastes, according to Newman.
Make up Sex - The best feature of a heavy relationship; eclipsed only by "conjugal-visit sex".
Master of your Domain - One who can refrain from masturbation. (Also: Lord of the Manor, King of the County, Queen of the Castle.)
Public Fornicator - A porn actor.
Put in - The length of time one has to keep up a relationship after a sexual liaison. Elaine suggests three weeks.
Sexual Camel - Someone who can go great lengths of time without sex.
Sexual Perjury - Faking it.
Shrinkage - Physical reaction men have to cold water.
Slip One Past the Goalie - To impregnate a woman.
Stopping Short - Frank Costanza's technique to cop a feel in the car.
The Switch - Dating a woman, then dating her roommate after the breakup. Has never been done successfully.
The Tap - Sign a woman uses to stop oral sex, sort of like the manager coming to the mound and asking for the ball.