1) most of my friends were tomboys
2) At the age of 4, I learned about sex from a boy who had overheard something, and I decided we should try it out. He was a little uncomfortable with the idea, so I volunteered to bottom. What we did wasn't even remotely sex, but the analogy is sound.
3) I learned to sew, braid, cross-stitch, etc., and I was proud of my gender-bending ways.
4) I could keep up with the girls at jump rope, rings, bars, etc.
5) I was never competitive and I hated sports of all kinds
6) Tucking in a mirror looked good, so I tried my mom's dress on. Disappointment: I looked like a boy in a dress, not a girl.

7) I always found it weird that boys and girls didn't get on better -- I had boy friends and girl friends, why didn't anybody else?
later in life...
1) after puberty, I only wore baggy black clothing; I began taking pride in my filth and stench at the age of 21. Budding dysphoria?
2) I was never any good at approaching people I was interested in, and frequently implored my female friends to ask out their objects of desire.
3) I'd occasionally shave things, with the hopes that a girlfriend would be impressed / interested / turned on. Noooope. Kept trying, sometimes multiple times with the same girlfriend.
4) Discomfort with the fact that my friends are mostly male, and that my libido and low impulse control kept scaring off potential female friends like whoa.
5) Overly proud of how "secure in my manhood" I was... I'd do girly things just to show off how... manly... huh. Yeah, that.
6) No attachment to my "manhood" -- didn't care how big it was, was crazy proud of getting kicked there and taking it like a champ, never seemed to mind when others talk about getting hurt there.