When I was 13, months before I hit puberty I had erotic encounters with my pubescent friend. I used to stay at Raul's house at weekends often cos I was a boarder and he lived near the school. He was one of the 'cool' guys in our year. He had suddenly become more friendly with me which I went along with. I was told I was 'sweet-looking' by girls. I wonder now if his motives were sexual.
One day we were lying across his bed when he said his [older] brother had showed him how to masturbate. I was so naive I'd never heard of such a thing. So I asked Paul to show me.
He pulled down his trousers and revealed a large cock (6-7' erect) surrounded with hair. I did the same-a tiny white penis (then 3' erect) not a hair in sight! We both vigorously jerked our cocks and each others. He would be able to cum pumping his white over my smooth hairless ass or groin.
He obviously enjoyed things more than me. I enjoyed rubbing our cocks together more than anything, it was very arousing. We also used to snog each other.
This used to happen often over 6 months. Including a two week holiday where we shared a hotel room! We were frustrated cos we were too young for girls. We drifted apart before I got chance to try things post-puberty. Sometime I may satisfy my curiosity.