Once a Cheater, Always a Cheater?

I first heard the statement, "Once a cheater always a cheater" when I was in high school. Maybe some women are born with an innate desire to believe in the ability to change. I know I'm a little more evidence-based myself and if history is any indication, I'd say Don Draper will spend the rest of his fictional life appearing in the beds of women all over 1960s Manhattan.
Ron Jaffe/AMC

LOOK: Megan Draper's Best Looks

As ‘Mad Men’ returns this Sunday, we can’t help but look back at style icon Megan Draper’s best looks and wonder what season six will bring in the fashion department. Megan, played by Montreal-born a...