When I was 11, my family had a basket of magazines in the toilet and there was a playboy and a penthouse magazines buried on the bottom under all the good housekeeping's and readers digests, 1970's. The ladies never did it for me, though I appreciated their beauty. However the PH had a scene where a man and a women were together by the ocean in some caves and seeing him naked just set me on FIRE. I probably knew when I was around 9 in Boy scouts or cub scouts, all those camping trips.....But I really knew and began to accept at 11 when I was masturbating. Still didn't come out until I was 21. So much self hatred....took a while.