One of my more exciting moments was when I 'caught' a couple in a park. His pants were around his ankles, leaning back on his elbows and a woman using both hands to jack him off. She was kneeling and looked up at me and said "Hi, why don't you join us?"
I was alone that time, so I sat down cross-legged beside the man and watched her expert technique stroke him. Then she asked if I had ever jacked another guy off and I said no. I never really had the opportunity or desire, I guess. "Here" she said, "give me your hand" So she guided my hand over to this guy's cock. I grabbed it but was momentarily dumbfounded by the strange feel if it. "OK" she said, "use your other hand firmly on the base and stroke with the other" It was surreal sitting there jacking this guy but then she quickly stood up and slipped her panties off." OK, now, do exactly what I tell you. Get it sticking straight up. I'm going to sit on it".She lowered her body down, flipped her skirt up to reveal his cockhead barely penetrating her. " Now jack him off inside my pussy" I started moving up and down vigorously, my hand slapping into her lips. In a matter of a few seconds she was coming hard, crashing down onto my hand, still wrapped around the hard cock. She rolled away and immediately the guy leans over and undoes my pants, nearly ripping them off. He tugged down my shorts, and with a snort, landed his open mouth on my erect cock. I saw him stroking his cock as he sucked my dick. He was able to take it all, lingering at the bottom and twisting on my cock. Just then the woman moaned and I saw her hand thrust into her crotch vibrating as she came yet again. The guy stopped sucking me and focused on his stroke, leaning back and launching a gob of cum..The woman caught some in her hand a started working on my cock. I came almost immediately. It was a bit awkward cleaning up and leaving, but we managed to smile at each other as I walked away.