The Simpsons Episode 19.07 Husbands and Knives

Upset by the environment of her local trendy gym, Marge decides to open up a women's only workout center (ala Curves). To Homer's surprise, the gym is a huge success. Marge decides to open a chain of women's only gyms in other towns. At a women entrepreneur convention, Homer meets other husbands of successful wives who are all young, attractive and in-shape. The husbands warn him that Marge will "trade up" sooner than later. Worried that he will become a trophy second husband like those he met earlier, Homer decides to undergo plastic surgery. Marge stops him before Homer goes too far with more radical procedures.