How I Discovered Mutual Masturbation

 I had a friend named Mark that I hung out with at school. After we moved to a new neighborhood I discovered he lived nearby so we would get together on weekends and after school. One day he invited me to go to his uncle Freds to watch teasers. I didn't know what that was but agreed. Uncle Fred was about 6' 2" Sturdy built and muscular. White hair with a bald spot like a monk at the crown of his head and durable smile that never went away. His wife Elsie. Not sure of the spelling. Was what we called strawberry blonde. She had light reddish blond hair to about her shoulders blue eyes and a smile matching Fred's. and I'm sure she was the cause of his. she always wore cotton fitted dresses that were snug but never tight still showing every curve. I would later discover they enjoyed having the boys that would come to their home through their nephew.  After introductions, Mark led me to the basement. There were different rooms for laundry, storage of canned goods Elsie canned and work rooms. One had several low tables that would turn out to be benches for sitting on to watch the teasers.Mark told me to get comfortable and got an 8mm projector and put on a small reel that looked like the cartoon reels my uncle had with his projector. He would make movies of family events and show them and cartoon reels. What I saw was no cartoon. A woman in black stockings and garter belt was rubbing a mans crotch and advancing to adult activities. The scene took my breath away as I was only fifteen. I looked over at my friend and he was getting undressed. In no time he was nude erect and stroking. He just looked at me and said I needed to catch up. I asked what he was talking about and then he said this is what he was talking about with teasers. they were for stroking. He put on a bigger reel he said his uncle had spliced together and waited as I got undressed. So we began getting together, sometimes with other boys. We would strip down get a rag from the rag bin to shoot in and masturbate.  Then one afternoon after school he asked if I'd ever done mutual. I didn't know what he meant. He started a big reel after we were undressed and told me to come over to his bench. He laid down and told me to lay up next to him and put my legs over his. I did and asked like this laying with my legs on top of his face up. He said like this and grabbed my legs pulling me up against him cheek to cheek so that I had to move my scrotum from between us from being squeezed. Then he told me to reach down but grasp his cock instead of mine. At first it felt awkward but exciting as I was holding someone else's erection. But feeling his grasp on mine was great. He asked if I liked a tight grasp and I said absolutely and I usually pull it so it gets stretched out. And he said me too. So I began stroking his cock and pulling it. He said that 's great. keep down that. I had touched other cocks but never thought of stroking them off. Watching Porn on the wall, stroking someone else's cock, having my cock stroked by someone else was was enough that it didn't take long and I blew squirt all over both of us. It took Mark a little longer. WE wiped down with the rags cleaned up and took the rags out took the trash can. Mark asked, "How was it?"  I just said I don't have a word for it. It Became my favorite way to masturbate. There were many more occasions to stroke each other and more. That will have to be told later.