I'm new to this, so comments are welcome!
I lay on my back on the bed, stroking slowly. I thought of the sexy, unapproachable girls on the beach. I thought of their pert breasts in bikini tops with the nipples showing through (nice effect in the cold seawater). The wet fabric clung to their bottoms, and even showed their pussies if you got the chance to be in front of them. I stroked harder. I imagined them stroking me, their hand around my cock instead of mine. The other hand on their pussies, pushing through the curly dark hairs, opening their lips, fingers going inside...
Come spurted out onto my bare stomach. I watched it shoot out the hole in the top of my cock, sticky strings across me. My teenage need partly satisfied, my breathing settled down. I was going to reach over and get the familiar kleenex when I heard a faint gasp, outside my open window. I knew no one was out there (otherwise I'd be a whole lot more discreet), so what was it? I lay perfectly still in the warm summer evening. I thought I could hear breathing, or was it the breeze? No sound now, did I imagine it?
The neighbours were the Phuongs, originally from Vietnam, a middle-aged couple. They were extremely quiet - you barely heard them at all. They could not possibly have been the source...
I was put off any more self-pleasure, for a few days anyway, but a teenage boy still has needs, and I was too shy and awkward to approach the real thing. (At eighteen years old I was starting to wonder when "the real thing" would happen.) So I visited my fantasy girls. I was back on my bed one warm evening again, hard as a rod of iron. But this time I was more alert. Yes, I could sense something, someone, breathing.
I started to stroke myself up and down, up and down. The breathing outside got heavier, with occasional gulps. It's weird, but I found it a turn-on to be watched like this. I changed the rhythm a bit and stroked my legs as well. I may have been shy and awkward, but I had an imagination!
With my come shooting out again and splashing on my stomach, I heard the gasp. Definitely the same gasper, a female I guessed. I had placed myself so I could sneak a glance out the window without (I hoped) being noticed. It worked.
In the window of the Phuongs' house I could make out the outline of a head, with long straight hair, bobbing slightly. I knew it was a young-ish person, and I was sure she was enjoying the sight. I should have been mortified, but the warm night, the mystery, the whole craziness just got to me. I loved it. Definitely coming back tomorrow, I thought.
Tomorrow and over the next days I put on more of a show. I "accidentally" arranged my bedside light to show off my cock better. I turned on the bed and spread my legs. I ran my hands over my balls and backside. Hell, I thought, girls do it for guys, and in fact it feels pretty nice. I was learning a lot.
The watcher enjoyed it all. I guess she worked out pretty quickly I was performing for her, as she came much closer to her window. I could see her long dark hair, and almost see her fine Asian features. I could tell she was stroking herself, across her breasts and down between her legs. I didn't mind, in fact it made it special. The fantasy girls had left the scene. I was doing it only for my "guest".
Then there was a very special night. She turned her light on. I could see clearly, she was a slim Asian girl, a bit older than me maybe, with long hair and very small breasts. As I lay looking up at her (their house was up the hill), she undid the buttons of her blouse and revealed her dark brown nipples. They looked gorgeous. My cock stiffened even more as I pulled the foreskin over the head and back. It was a great climax.
It got better. Next night, she was raised up at the window so I could see her dark thatch of pubic hair. Then to my disbelief, she did a wonderful thing to a shy late-teenager. She lifted up one leg. The light caught her hairy triangle and I watched her slide her fingers down and open her lips to me. With one hand she rubbed her clit, with the other she slid one, then two fingers into her waiting channel. I can see it to this day in my mind's eye. It was gorgeous.
I think she came. She rubbed harder and harder, her head bobbing slightly, then suddenly held her breath, then I heard the gasp I'd noticed all that time before. I'd stopped pulling myself as I was lost in awe, but I only needed a few more strokes to make own happy ending.