What You Never Knew About Wife Swap

"Wife Swap" debuted in the U.S. in 2004, following the simple premise of its British predecessor: two families swap wives/mothers (or the occasional husband) for two weeks. During this time, the families must live by each other's rules. So a meat-eating family might switch to a vegan diet, or an affluent family might have to live in a more down-to-earth way. The results, as you'd expect, are often pretty dramatic, and the spin-off "Celebrity Wife Swap" ups the ante by inviting famous folks to try their hand at the "Swap." Think you know everything about this highly entertaining reality TV social experiment? Here's what you never knew about "Wife Swap."