So I entered puberty at age 9 (very early) - I can document this because they took class pictures throughout Elementary school... you know the ones: smaller kids sitting on the floor, legs criss-cross, a row of kids behind them on their knees, and another row in the back with the tallest kids standing... the teacher off to the side, and a little sign in front showing the teacher's name, the grade, and the school.
Well, in 3rd grade, my class pic looks like there are 2 teachers... except the tall one opposite the teacher was me - quickly approaching 6-feet-tall!
My 4th grade class picture was similar, but I've lost my 5th Grade class photo... But, I will say this: my 6th Grade English teacher told me she passed me because I was "too big" to hold back!
So there I was, 6-ft in the 3rd Grade, age 9 - and my neighbor was a family with a 12 y/o girl, a 13 y/o boy, and a 15 y/o girl.
I was walking home from school one day and happened across that 12/yo girl in a wooded area (it was a shortcut path all the kids from my neighborhood took)... anyway, she was curious, I was curious, so she showed me her 12 y/o growing tits and little patch of hair over her pussy, and I showed her the little patch of hair over my grown (maybe still growing - I don't really recall) dick. I got it hard for her and she was ecstatic. It didn't happen THAT DAY, but later we started fucking...
The following fall, she started Middle School (6th Grade) and started fucking "older" boys (no doubt, with bigger dicks - I may have had a "man's dick" at 9, but it was still - and remains to this day - a totally average-sized penis... nothing to write home about, LOL.
When I was 11, the brother and I were playing in my backyard pool... one thing led to another, and we sucked each other off... later that week, we fucked in his bedroom (on his waterbed!)
So: 9 with a girl, 11 with a boy.
I've had an "active" sex life ever since - with both men and women - but last had sex with a woman in 2011 (with my now ex-wife). I'm open to it again, but since I'm dating a man currently, I'm hoping it never goes there! 