One day, a friend of mine, a girl, who was then and still is one of my best friends, and I were hanging out. I couldn't tell you where or what we were doing, but I think we were perhaps on our way back from a party, or maybe going to one. She mentioned to me, very casually, "You know, Jeff, sometimes you make these sexist jokes, and they're hurtful."
It was in a very casual situation, and perhaps my remembrance of it gives it more weight than it really had, but that was my "click" moment. Somehow, that casual comment, even though I'd already read about and believed all these things about feminism, hammered home the fact that I was not living by the principles I purported to stand by. How I was living was hurting my friends, and not unlike other young people, my friends meant everything to me.
(By the way, this "Jeff" is not me...though I may like his blog more in part because he has such a great name.)