Putting on a show for the girls.
When I was twenty eight, my younger sister came home from college for a visit, bringing three of her friends. They were all cute, and one was hauntingly beautiful. She was Portuguese, about five foot four, one hundred fifteen pounds, a perfectly rounded figure, lustrous wavy reddish brunette hair, enormous brown eyes, and just radiated sensuality.
Most of the time over the five days they were in the house, I had spontaneous erections when I was around them, and was constantly running to my room to masturbate. Several times I was so frantic that I forgot to lock my door, before long they had each seen me stroking away and twice seen me ejaculating. On the final night, the truly beautiful girl was down the hallway from my room, watching television. I could look from my doorway and see her in profile, sitting on the couch. I was overwhelmed with horniness, and ripped my clothes off and poured a ribbon of lotion over my aching cock. I opened the door of my room, and stood halfway out the door, leaning against the door jamb, and stroked my painfully hard erection. The thought that this girl could turn her head and see me frantically jerking my cock was thrilling beyond words. I was so stimulated that I would over and over jerk my cock in a blur, until I could not bear it, then stop for a moment until I had to start stroking again. I was making such a loud slapping sound, and panting, that I am sure she knew what I was doing, she would half turn her head and seem to look quickly, then go back to looking at the TV.
Finally, I was able to come, and I arched my back and stood on tiptoe, and ejaculated across the hallway, splashing come all over the wall, and on the floor into my room. I was sore for days after from the intensity of that session. From the looks I got the next day as the girls left, I think they liked the show I put on for them.