I submitted a story earlier about me and my Dad's sander.
I was only 9 at the time, but my first almost orgasm occurred whilst pressing against a board that my Dad was sanding. I told my brother about it and he told me that you could do it with your hand, and he would show me.
Later that week, while my parents were out, my brother proceeded to take me into his room and teach me a new trick. He already had a hard-on, and I quickly got one when he took his out. He was 11 and I was 9. He was about 1/2' longer than me, but had more girth. He put his hand around the shaft and slowly started rubbing it up and down. I could feel all the blood in my body going to my mid-section.
My erection got harder as he explained that rubbing it long enough would cause an orgasm. He grabbed my dick and gently stroked it until I started feeling the sensations. Then I rubbed my own dick and watched him. He laid back on his bed, stroking up and down.
I was just watching, but my dick was throbbing with anticipation. Finally he said he was cumming, and with that, a large amount of semen oozed out of the tip. He cleaned it up with a towel and told me to go to my room and try it myself.
Eager to duplicate the feeling that I had gotten days before with the sander, I went to my room, and he followed me in and watch me get started, then closed the door behind him as I began stroking myself. I rubbed myself raw, but had my first dry, self-inflicted orgasm. It wasn't until months later, while jerking off at a sleep-over at a friends house, that I had my first ejaculation.
After that, on many occasions, my brother and I would get together and do each other. There was never any feelings of homosexuality, just boys having fun with their dicks.
From that day on, I masturbated at least every day, sometimes 3 and 4 times a day until I was out of high school. I graduated from jerking off with my brother to masturbation with a female cousin, and I still am an avid masturbator, and will get myself off as soon as this story is finished. My wife and I now enjoy mutual masturbation, and actually prefer it to intercourse.
This is a great site. Keep the stories cumming.