When we were younger, my cousin and I used to play with our dicks togther when we were alone. It all started one day when we were in the bedroom and I had a really stiff willy. I leaned back on the bed and looked at it sticking up from under my clothes, and said something to him about it. “Lets have a look” he said, and with that, peeled my shorts and pants back to reveal my huge erection. After he had seen mine, he layed on the bed and got his own willy out, pulling the foreskin up and down over his moist head until he had gone stiff.
After this, we used to get our willys out quite a lot and play with them together. His willy really fascinated me because he had such a lovely foreskin which came all the way back over the head, and he always seemed to be nice and wet under there as well. One day, he pulled his foreskin back and told me to kiss the middle bit of his willy, and as I leaned down, I remember thinking how nice the smell was under there. We don’t do it now unfortunately, but it was nice while it lasted.
I have happy memories of my best pal at school and I often playing with out willies, and comparing it to each other. (I was always far better endowed than he was). We lived on a smallholding some miles out of town, and when he visited us (which he often did) the two of us would wander off to the river and skinnydip, and then having a masturbation session. We played a little game and competed who would cum first, or who would have the biggest load of cum, or who would cum the farthest. Needless to say, I usually won.
I still remember the very first time I demonstrated masturbation to him (which he had never done before). He watched in awe as I cummed and the white semen spilled from my erect penis. He wanted to know if I could ejaculate more semen, but did not realise that the size of my load was not controllable. He then masturbated for the very first time, and the pleasure when cumming was something I can still remember. All he could say was: “That was nice.” We alwasys had a mutual masturbation session after that first time.
A couple of times we would dock together and masturbate like that until both came. My prepuce was longer than his. We would roll back our foreskins, put the heads together, and he would roll back his foreskin first to cover both penis heads. Then I would roll back my foreskin, going quite a distance over his penis. Boy, were we tightly coupled that way! It sure would have hurt a lot if either would have suddenly pulled away to undock. Then we would masturbate until both had an orgasm. I was ususally the one whose hand did the stroking. It was lovely filling up our combined prepuces with our warm cum until it stood like a little balloon. I normally found that I would cum first, and that would then immediately precipitate him having an orgasm when my warm cum filled his prepuce. Then, when both penises were limp, we would roll back the foreskins again to undock and clean up. 
Those were the days before HIV and we never worried about STD’s.
Neither of us became gay in later life, although on the Kinsey scale I guess we would both score a one (heterosexual with homosexual experiences). (On the Kinsey scale 0 is totally heterosexual and 6 is totally homosexual, with different combinational levels in between).
We did this until we were into our final year at high school. We went to different colleges after completing school and never experienced mutual masturbation or docking after that. :stretch: