I was watching a show called "In Plain Sight", about witness protection.  at the end of the episode, one of the male characters delivers a line which I thought hit real interesting point.  "Pregnat women are only unattractive to men who have never consummated a relationship with one".  True

By that logic, anyone who doesn't like BBWs hasn't had sex with one. You more or less develop a fetish when you're young as oppose to just overnight after a one night stand.