I was 13, and just got out of the shower. I went to my room and closed the door, and took my robe off to get ready for bed. As I looked down at my naked body I noticed that my penis was beginning to get stiff, and I watched as it grew longer and longer until it was pointing straight up, bowed back like a banana. I was a little surprised that my heart was beating faster and I enjoyed the feeling of my penis being so rigid, it felt good.
I remember holding my penis with my fingertips and pulling down then up on the shaft. I felt unbelieveable, and the head of my penis was electric as I stroked. Then I realized that I had stumbled on something special, my penis felt better and better as I played with it, and suddenly I felt like I needed to urinate when a wave of pleasure rushed into my penis, sending spurts of semen out of my penis in powerful squirts, I let go of my penis and watched as it jerked up and down in contractions. There was semen dripping on the floor and I was breathing hard, gasping at the pleasure I had just produced.
This was my first masturbation and ejaculation.