This happened when I was 15 - my neighbor is so sexy it was amazing when she rubbed my penis and masturbated me.
Next door to me there is this super hot girl named Julie. She has a sexy figure, nice size dd boobs (round and full) and a hot ass. We were good friends but didn't usually talk about things like masturbation. But I had masturbated many times thinking about her. Only one time when we were really young we were just sitting together and she reached over and grabbed my crotch. I was excited, but too young to know about masturbation so that was it.
One day I was over at her house and it was just us two. It was a hot summer day, and she was looking so sexy in her tight black tank top and short shorts that fit perfectly around her round butt. She had a pool in her backyard and suggested we go swimming. She was just about to go get changed when I said, "Hey have you ever been skinny dipping in your pool?" She looked at me with a naughty look and said "No, but let's try it!"
We went outside to her yard which was sheltered by cedar hedges so no one could see us. First I took off my shirt, then she took off hers. OH MY GOD. Her boobs were perfectly round, flawless and firm like melons. Then she took off her shorts and panties and she was completely naked. She was even more sexy than before when I could see every curve on her body. Then I had to take off my shorts. Since it was hot that day, I was just wearing gym shorts with no underwear. I looked at Julie and realized she was looking at my crotch with that naughty smile again, and then I realized that it was starting to bulge a bit. I thought what the hell and just took off the shorts.
My penis is not huge - probably about six inches when totally erect. At the semi-erect state it was in it was probably about four inches. Even so, when I took off my shorts she squealed aloud with delight and a huge smile came onto her face. I smiled with her and we swam around in the pool a bit. Suddenly, when I was swimming she swam underneath me and grabbed my penis, squeezed it then let it go. It was so exciting I got a full boner.
After our swim we were drying off with our towels and I said "that was fun." Then she replied, "yeah. You want to have some more fun?" She then moved closer to me and grabbed me and we started making out with her boobs pressed up against my chest and my penis pressing on her pelvis. She then grabbed my penis and squeezed it and started stroking it gently back and forth with one hand while rubbing her beautiful boobs with the other. Eventually I could feel myself getting closer to an orgasm, and she sped up, grabbed my balls, and I was almost there and ... aaaaaaaaaaaaaaaaaaahhhhhhhhhhhhh! It felt sooo good on my penis having her tender hand gently moving it back and forth bringing me to a more intense orgasm than I ever could have gotten on my own. After that we went and had a shower together then made out a bit more. That's all for now, but I think she'll be wanting some more fun sometime again!