Sometimes, you really can't see what's coming next until it actually over, but the end is only the beginning.
At 13 before I'd even started masturbating, my cousin Peter who was 11 came over one summer for vacation. He and I had nothing in common. Because it was hot upstairs and the AC was downstairs, my parents slept downstairs and we slept in their room. as time went by, Peter and I began to joke and have play fights. one morning, while we were joking around, he'd rush towards me and tried to grab between my legs and squeeze it, but I always moved away not thinking anything about it.
Eventually, the nest time he came towards me, I decided that he had a penis too and it he grabbed mine, i'd just grab his too. When he grabbed my penis, I said 'Oh yeah? well I can do that too.' After that, I don't know what happened, but we were on the floor with our dicks hard as rocks and playing with each other's dicks in our pants. Every everything that he did to me, I did it right back to him. Even this seemed like we were playing a game like 'anything you can do I can do better,' it felt really good to have someone rubbing my penis. I'd had my penis rubbed before, but not by a guy. From there, he moved his hands around from my groin and shoved his hand in my ass crack, but not my ass. So I moved my hand from his balls, which were hairier than mine, and moved towards his ass to do that same thing to him too. As I tried to do it, I sort of chickened out, removed my hands, and got up. The first thing I did was to start joking him about being gay. He just laughed about it and that whole summer that he stayed at my house, we never mentioned it again. The more we met, things got more interesting, but that's for another story.