I'm a 62 Bi M... This story is complete fiction, though I hope it happens ;-)
I drove into the state park and drove a couple of miles down the main road to Parking Lot D. It was a small lot with about 5 spots, all were empty when I got there. It was 85 degrees with a nice breeze. I was just wearing a pair of gym shorts...tied loosely around my waist for easy on-off. I walked through the copse of trees on the path where it opened up a bit. There was a small platform at the end of the path that overlooked the lake. This part of the park is usually empty when it's this hot since there isn't a place to swim. I didn't want to take my shorts off just in case there was someone a head of me.
When I got to the end it as empty as I had hoped. I immediately started feeling turned on and slid my shorts off. I'm 60 years old, bi married and on the DL and I'm very fit BTW. I reached into my shorts and pulled out a joint and a lighter and smoked about half of it. I was loving the heat of the sun baking my entire body. My 6.5" cut cock was slightly hard and was already leaking precum.
I put my right foot on the bench and started to rub my fingers on my anus. With a little spit I quickly had two fingers knuckle deep. I wiggled them around and pushed them in and out loving the intense pleasure that emanated from my anus and rectum. More spit and in went the the ring finger making it three. I rammed them in hard and fast and twisted them around...I was moaning out loud too. My cock was 1/2 hard and was a stream of precum which I tried to capture with my right hand to savor.
I was squatting on my toes, and had my left hand and fingers reaching around jamming my hole...I was grunting in pleasure and was in that anal pleasure trance. Then I heard a man and a woman's voice coming through the woods. I grabbed my shorts on the bench and had them on in a millisecond and my heart was pounding in fear that they heard or saw me. I can't control my moans when I anal masturbate. I grabbed the napkin I had and made sure my hand was clean. I sat on the bench and tried to act like nothing was out of the ordinary.
The man and woman turn out to be in their late 20's. She was very attractive, slim, and about 5'8". She had big sunglasses and a straw sun hat and full length sundress. honestly, she was a babe. He looked very fit, 6'2" and lean, beard like everyone his age, shoulder length dirty darkish blond hair. He had on long shorts and a white cotton shirt unbuttoned. All I had on was my shorts.