Elaine complains about her friends pressuring her to have a baby. She meets Kevin and wonders if he's serious about not wanting kids, and he reveals that he's had a vasectomy.
Jerry fights an inner war over a woman he hates, but who gives him great sex. In an attempt to break himself of her, Jerry has Kramer tear up her phone number.
The teacher poses to his students the Monty Hall problem, which investigates the probability of choosing a correct answer given three options and the subsequent probability of changing the original choice. The teacher explains why his students' instincts are not correct.