3. Red and Kitty Forman on That '70s Show
Played by: Kurtwood Smith and Debra Jo Rupp
The focus of That '70s Show was on the sexcapades of the the Forman's youngest son, Eric, but no couple kept it consistently alive quite like his parents, Red and Kitty. The couple, who always capitalized on their alone time (i.e. subjected the audience to uncomfortable pet names and foreplay), had so much sex that they even had a pregnancy scare in the fifth season of the show, which turned out to be an early stage of menopause.