Sometimes I get the idea that it would be fun to practice walking in heels.
Five minutes of walking like a clutz later, I take them off and vow, "Never again."
I have enough trouble walking in normal shoes - heels are just a whole new and painful way for me to embarrass myself.

As for what caused me to realize that I was trans... well, I can't really say. I don't have a huge number of memories from my childhood, or my life in general, so it looks like I just up and got the idea one day that I would love to be a girl. It took me five years to discover that it was possible outside the realm of magic, two years to tell my mom about it, and three more years to start doing something about it.