Jerry confirms that George is in love because he is scrubbing his bathroom for his girlfriend Karen. George is insecure about his sexual performance, but is sure he could tell if she was faking an orgasm. Elaine admits to getting away with faking back when she was not having orgasms, including "all the time" when she was with Jerry.
This rude awakening hangs over Jerry, and he nearly backs out of dinner with Elaine. Kramer does not take this seriously, having also faked before. He is far more concerned when he bites into a bad peach, which he takes back to Joe's, the local grocer. Joe denies him a refund, dismissing the peach as an "act of God" and banning Kramer from the store.
George and Jerry both feel inadequate as they watch Karen and Elaine orgasmically savor their food. When Elaine admires Meryl Streep's "authenticity" in a new movie, Jerry reaches his breaking point and cajoles Elaine to give him "another shot" to prove himself, even for half an hour. Elaine insists that sex will ruin their friendship, and Jerry sulks. George is crestfallen and blames Jerry when he fails to get an erection with Karen, and Jerry and Elaine continue to bicker after Jerry walks out of the movie.
George is not consoled to learn that even Houdini supposedly suffered erectile dysfunction, while Jerry polls many old girlfriends about orgasms to spite Elaine. Kramer, repulsed by supermarket fruit, drags Jerry to Joe's to buy fruit for him. Jerry is also banned when Joe easily recognizes Kramer's finicky fruit shopping list, like "plums with red on the inside". Kramer and Jerry enlist George to buy fruit for them both, but neither has cash to pay him back.
Kramer pushes a mango on George, which is so delicious as to revive his erection, just in time for another date with Karen. Elaine and Jerry resentfully give back each other's things. Realizing that only sex can save their friendship now, Elaine grants Jerry his half-hour.
George's sexual performance immensely pleasures Karen, but he assumes she was faking, and she throws him out. Jerry fails to get an erection and blames George, but is reminded that there is more mango left.