I believe I was 14, maybe 15. Us neighbor kids used to "camp" in tents in our backyards over the summer. One night a friend of the same age wanted to suck my dick. I can't recall if he asked directly, he may have just asked to see it. But I know he then made a move to suck it and I liked it.
Over a couple of years he sucked it many times. I always enjoyed it, but he never got me to cum, even though I had no problem cumming for myself when I masturbated.
Later I met an older guy in the town outside at night. He pulled it out and said I could do whatever. So I sucked him. Again there was no ejaculation.
But another year or two later when I was 16 I stayed overnight with another older friend who moved out of the area. We jerked each other, sucked each other, and we happily spurt our semen for each other.
I didn't pursue any homosexual activities much then, but I wouldn't turn them down if offered. I was 18 when I had my own apartment and first had the chance to fuck a woman. She was older and I really enjoyed it whenever possible. I was hooked on pussy and tits. It was many years later before I tried sex with a guy again. Today, I'll take any gender. My dick doesn't sexually discriminate.