This is not an actual occurrance (yet) but one of the many fantasies I use to get off!
I have this fantasy that I'm hoping will come true some day.
I'm lying on my towel on a nude beach, totally nude (of course) sunbathing. Sometimes my husband is next to me and sometimes I am alone. Nude guys are walking by (all ages, all sizes) and openly checking me out since this is a nasty nude beach where it is known that men jerk off in the forest up above the shoreline.
One man confidently walks over and stares at my breasts and my unshaven pussy. He starts to stroke his penis and it stiffens quickly. I'm watching him through my dark sunglasses and I open my legs a little so that he can see a little bit of my labia. Seeing this, he strokes his dick faster and comes quickly. With a grunt, he ejaculates, his semen plopping into the sand not too far from my towel.
By this time a small crowd of beautiful naked men has gathered and their penises are in various states of erection, twitching and pulsing with the need to get off. Some walk away or head to the bushes, but a few more are brave enough to approach me and they wack off furiously. I open my legs wider so they can see my swollen lips and in minutes there are little puddles of semen dotting the sand all around my towel.
After that, people walk by and now and then a man notices the semen in the sand, walks up, and goes to town. The whole time this is going on I don't make any movement except for the opening and closing of my legs to show off my pussy. After I go home I masturbate with abandon to the images in my head of all these men jacking off for me!