I have so many friends who say that they used to believe that gender was not innate, until they had their kids, who just (a) had so much "boy energy" (if I hear that phrase again I'm going to barf) or (b) always wanted to wear pink dresses, even though they didn't encourage them.
I know "me too" isn't really a very productive response for a list, but I hear this a lot and it drives me crazy!
Margaret