Bi-curious scenes while masturbating - Part 2

Frank and I had two sleepovers during the summer when I was fifteen. Our parents were friends and they left us together while they went out. The first night we talked about girls and worked our way into masturbating. We started playing little games where we would get in a position and touch our penis to the other's butt, at first just to the crack, and then to the hole. This felt wildly sexy and in the third or fourth position we tried I couldn't stand it any longer and beat off until I came with his penis touching my hole. The second night was two weeks later, home alone at my house. We were naked and masturbating, just kind of casually walking around my room, when he said "I think you should get fucked tonight." We knew we weren't going that far, but it made an exciting masturbation game to pretend we were. I led him into the bathroom and bent over the sink, where I could watch myself masturbate while Frank beat off and touched his dick against my hole. We tried a few more positions. I liked it when I laid on the bed and he put the whole shaft of his dick between my buns like a hot dog. I humped my pillow, then got on top and did the same to him. I couldn't edge any longer so I straddled his legs and beat off until I shot cum all over his ass. With my middle finger I rubbed my cum between his buns and around his hole while he humped his pillow and came. The scene I am thinking about this morning happened eight months later. We had hung out a couple of times in the fall without anything happening. Now it was the dead of winter and I was feeling that bleak winter kind of horny, if you know what I mean. I had just gotten my license so I hopped in the car and drove to his house. I entered through the basement, where his room was, so I wouldn't have to see his parents or sisters. Somehow it was clear that we were going to take our clothes off and beat off. Soon we were completely naked and he broke out the jar of Vaseline and we started. No words were spoken, but there just came a time when I knew that we were going to play that game again. I replay that scene over and over when I masturbate, but I can't see the detail of how we got there. I think he just walked up behind me stroking his dick. I bent over and felt the hot fleshy tip of his penis pressing against my hole. That first touch always sent a thrill through me! I had always thought I would like to be bent or laid over something, like the arm of a big leather chair. He had one so we tried that for our next position and it felt sexy and vulnerable. Suddenly his younger sister opened the door at the top of the stairs to ask for help with her homework. (I sometimes fantasize now about her coming down and catching us completely naked, masturbating, and doing other things.) When the door closed we continued with the added excitement of almost being caught. I am very anal and was already penetrating myself with a variety of objects during solo masturbation. I have to tell you that in these masturbation-play sessions with Frank the temptation was very strong. But if anything else HAD happened, I couldn't write about it here.