The episode opens with one of Jerry Seinfeld’s stand-up comedy bits which centers on the creation of seedless watermelon.
The episode then goes to Monk’s Cafe where George tells Jerry about his lack of confidence in bed with his new girlfriend Karen (Lisa Edelstein). The conversation then shifts to orgasm faking, at which point Elaine mentions that she used to fake with Jerry back when they were dating. Although Elaine didn’t think much of the subject, Jerry was flabbergasted at the information. This also causes George to worry that Karen was faking too.
A little while later, Kramer takes a bite out of a bad peach, and attempts to return the fruit to the store where he got it. This leads to him being banned from the store after he insults the owner, Joe (Leonard Termo).
Meanwhile, Jerry begs Elaine to give him another shot at an orgasm, even after numerous rejections, since she believes that sex will ruin their friendship. This causes Jerry to become more bitter and resentful towards Elaine.
George becomes too obsessed with his performance in bed with Karen that he experiences what seems to be erectile dysfunction. As George tells Jerry his predicament, Kramer asks Jerry to pick up his fruit at Joe’s fruit store, refusing to get his fruit at the supermarket. Jerry reluctantly accepts, and goes to pick up the fruit, causing him to get banned too after Joe finds out what he was doing. After the incident, George winds up getting both Kramer’s and Jerry’s fruit. George tastes one of Kramer’s mangoes, which makes an erotic transformation (“I think it moved!”).
Afterwards, Elaine gives in to letting Jerry have sex with her once again, after concluding it’ll destroy their friendship if they don’t. Meanwhile, Karen kicks George out of her apartment when he insults her after sex, doubting that she really had an orgasm (when, in actuality, she did).
The last scene shows Jerry and Elaine in bed, but now it seems Jerry is suffering from erectile dysfunction, and blaming George. Elaine then asks: “Y’know, I’m a little hungry…you wouldn’t happen to have any of that mango left?” Jerry then realizes his solution.