This happened when I was about 15 years old. I was returning home one night from an outing with friends. When I got home, I found that my parents had gone out. It had been nearly a week since I had last jerked off. I thought to myself, yes, no-one's home, I can have a really good jerk off session. Just the thought me being all alone with my cock started making me horny. As I slipped off my pants and cotton briefs, my cock was standing hard to attention. I slowly let the feeling subside, and got out some lube from the cubboard. At the same time, my folks kept an electric hand held masssager in their linen cupboard. I had discovered much earlier the pleasure derived from using the massager on my penis; I could also adjust the speed from slow to fast, to increase the pleasure and the resultant orgasm.
I turned off the lights. There was a warm fire going and I sat on the end of couch with the light of the fire reflecting off my body. As I sat there, I stroked my inner thighs, underneath my pelvic area and gradually my already rock hard cock. Then, I got the lube and started to wank slowly, up and down, up and down....This went on for at least 10 minutes, by which time, I got the massager and flicked the 'on' switch. I used the end of the massager on the tip of my cock and around the head and the frenulum area. Oh the joy I felt, particularly as I alternated between slow and fast speed, focusing on the sensation and the ever increasing mounting feeling of impending orgasm. I stopped the massager, and started jerking my cock with the lube. I took turns between using the lube and the massager. This went on for about 20 minutes. The absolute ecstasy of doing what I was doing and staring intently at my ever so rock hard cock was such that I felt like I had reached a higher plane of existence.
Finally, I got the massager and pressed hard against the top of the shaft of my cock, feeling the vibrations pulse all the way down from the tip of my cock to my pelvic area. It was at this moment that I could stand no more and I shot several huge spurts of cum all over the floor and into the air and sank into the couch, feeling an absolute state of bliss. Then I cleaned up the entire area and went to bed!! It was one of the most memorable occasions that I will never forget.