15. Marge and Homer Simpson on The Simpsons
Played by: Julie Kavner and Dan Castellaneta
Marge and Homer have sex, that much is clear—and the fact that they're still doing it after 24 years on the air is a tribute to their marriage. Sure, they have slow periods—when Homer gained a bunch of weight to go on disability in "King-Size Homer" (season seven, episode seven) Marge admitted she wasn't as turned on by the extra-large version of her hubby. In "Natural Born Kissers" (season nine, episode 25), they discover that the risk of getting caught turned them on, so they went on a spree of having sex in semi-public places.
It helps that Marge is a total fox—in "The Devil Wears Nada," (season 21, episode five) she poses nude for a charity calendar and becomes the talk of the town. This was around the same time, you may recall, that Marge appeared on the cover of Playboy magazine...