I think it may just be a personal preference. When I was your age I had several friends I got together with to do that. We all masturbated each other but I liked someone else doing it to me more than I liked doing it to them.
The best of all was having a girl touch me. It seems there is nothing that can compare to a girl's touch, for me anyway.
I was never touched by a boy until I was about 12, it had always been a female until then. First my mother always retracted my foreskin to wash under it until I was about 5 or 6 when she turned that job over to me. About that time me and the neighbor girls discovered the differences in our bodies. I had no boys to play with when I was a kid. The girls were really fascinated with the foreskin that rolled back to reveal the knob. One of them had brothers but they were all circumcised. What happened when they rolled it back (an erection) was really fascinating to them and it felt good to me too when they touched me so we did that quite a bit for several years.