The first time we had a threesome at the beach. We are a happily married couple in our late 30's. I, Michael, am 5'9" tall, 180 lbs with dark brown hair and a good tan. My wife, Vicki, is a little taller than I am at 5'11", has short blonde hair, long slender legs, and nice firm c-up tits. She was a competitive swimmer in college and still maintains slender athletic body. We work out at the local gym three days a week. Our sex life is good, but sometimes she wants to keep going after I'm spent, so we pull out the vibrator and pretend its a random stranger who has joined us in a threesome, it always makes her orgasm.
We had heard through friends at the gym that Casperson's beach in Venice Florida, was an unofficial nude beach which is also famous for having lots of petrified sharks teeth on the beach. We decided to check it out. It was a short 20 minute drive from our house. We walked to the deserted south end of the beach and set up our blankets, umbrellas, and cooler in the secluded sand dunes and went for a walk down the beach. While walking, we looked for sharks teeth in the sand. Need less to say, it's a great view watching my wife bend over in her thong to pick up teeth.
While walking, we met a guy named Jim who was also looking for sharks teeth. He was a nice looking guy, around 6'2, and a muscular, lean body. He was wearing light blue speedos and sporting quite a package. You could see the outline of his cock through the material. Jim told us he was a personal trainer and often ran the beach in the morning and walked back looking for sharks teeth.
It was a hot day so we decided to head back to our spot in the sand dunes and get some water.. Vicki asked Jim if he would like a water. I could tell that Vicki was interested in him, she had been stealing glances at him and his package while we were looking for sharks teeth. I have to admit that I looked at it too, it naturally drew one's eye to it because it stood out as as abnormally large package. I caught myself wondering how big it actually was when erect. I suspected Vicki was thinking the same!
When we got back to our place in the sand dunes, we could not pass up the ice cold beers sitting next to the waters in the cooler. I quickly passed everyone a cold beer and we sat under the umbrellas talking and getting to know each other. We felt really relaxed around Jim. Several beers later, we decided to jump in the ocean to cool off. I brought a mask to search for sharks teeth on the sandbar. Vicki used the mask first and found a few nice teeth while snorkeling. Jim and I talked while she was snorkeling. He was easy to talk to, and we talked about different bars in the area and fishing. He complimented me on having such a great looking wife, as we watched her tanned butt bobbing in the water while she snorkeled looking for sharks teeth. I told him that she was really adventurous, loving scuba diving, fishing, boating and beaches. He asked why we selected such a desolate beach, and I admitted that we often tanned naked. He laughed and said he did the same. As we moved into shallower water, I noticed that his cock was now semi hard, and the wet material highlighted the thick bulbous head of his obviously circumcised cock. Vicki came back and showed us the teeth she had found. She too noticed Jim's semi hard cock, and she stared at it a little too long. Jim and I both caught her sneaking long glances at it, and we had a silent chuckle. Vicki was quite obviously aroused, her nipples were hard, poking through her wet bikini top.
The three of us talked for a few minutes, then Vicki handed me the mask and snorkel telling me it was my turn to find shark teeth and challenging me to find a bigger sharks tooth. She was heading up to the blankets to dry off. I took the mask from Vicki and went snorkeling, all the time wondering what she was up to in the dunes. My cock was hard as a rock! I made myself wait awhile before returning to our spot in the dunes. I wanted to give them some time to see where this would go, hoping she would take advantage of this situation we had often fantasized about, but never acted on...