My mom bought a new dog when I was seventeen, and promptly broke her left ankle. It was left to me (My dad had left us by then) over a nine week period to walk her dog.
After a couple of weeks of walking the dog, I decided to take a new route which took me past a place where I soon discovered lovers, married couples and sometimes gay men would meet to have sex. Over the following seven weeks I got to see all kinds of people having all different kinds of sex. Amazingly because of my size at the time (I was small in stature) I just got kind of ignored.
One morning after I rounded a low hill cutting through a wooded area, I came across two older guys fucking. They didn't try to hide what they were doing and indeed both were pretty much naked. As I got closer I saw there was a woman, a semi naked woman sat close to them and she was playing with herself. I'd gotten to about fifty feet away when the guy fucking the other younger guy caught sight of me. He said something to the woman, who stood up showing me she'd removed her skirt amd panties. She shouted over for me to join them and without a thought about what I was doing, I dragged the dog over.
The guy fucking his friend just carried on fucking him from behind, as though it was perfectly normal to be fucking a guy in the middle of a wooded trail. The woman asked me if I was horny. The bulge in my shorts told her and the men I was. Not missing a beat the younger guy being fucked told me she was his wife and if I wanted to, I could fuck her.
She smiled up at me, opened her legs and spread her pussy lips.
I wasn't a virgin, but I'd only been with one girl my age. And that wasn't what you would call an amazing sexual experience. Still smiling she opened her pussy right up and said "It won't bite you, come on I want to be fucked". I probably broke the world record in taking shorts and underwear off, as I was stood half naked in front of her seconds later. My cock was so hard, it was throbbing. She took one look at my cock (I'm around seven and half inches) and told her husband "He's definitely fucking me". Letting the dog lead drop, I got between her legs and in one go, I slid my cock straight into her soaking wet pussy. She was my second ever fuck and I went at it like a jack hammer. She asked me to slow down, but I was too stoked to stop and carried on fucking her for all I was worth. Surprisingly I didn't cum for an age, as she had us change positions twice, finishing up with her face to face with her husband being fucked by the older man.
They began laughing which was a little off putting, until she let out a loud groan and told her husband "He's just made me cum honey".
It was a new thing for me making a woman cum. The girl I'd first fucked had to make herself cum by playing with her clit, because I was that nervous I'd cum far too quickly. With the older woman though it was different. She didn't want me to make her feel loved, she just wanted my cock and I found fucking her was so different. Holding onto her small tight ass, I told her I was close to cumming. She turned her head and asked me to cum in her husbands mouth. At that point I would have cum in anyone's mouth. Pulling out of her pussy, I stood up, moved up to her husbands face and unloaded all over his tongue which he'd stuck out. He immediately turned to his wife and they kissed.
About thirty seconds later my cum load was followed by the older guys cum, as he pulled out his asshole, removed the condom he had on and did the same as I'd done. Once again the man and his wife kissed sharing the gooey mess he had on his face.
Getting dressed I was about to leave to try and find my moms dog, but it came bounding in as if it had been waiting for everyone to finish. The guy who'd been fucked asked me if I lived local, so I told him where I lived. He said he and his wife would like to have some more fun if I was up for it. When I asked him what he meant by HIM and his wife, he said "I'd love to feel that cock inside my butt".
Over the next seven weeks until my mom got better, I walked the dog. I met the couple on several occasions outdoors close to where I first had sex with them. At first I just fucked the guys wife in front of him as he masturbated. Then on a rainy Sunday afternoon, I walked back to their car which was about half a mile down a dirt track. She sucked on my cock in the car as he watched on tossing himself off. Then when I'd become ultra erect, she told me to fuck her husband.
Putting on a condom as he leaned over the back seat of the car, I fucked my first ever guys asshole. It was so tight his asshole, yet so horny, as well as watching her finger fuck herself as my cock was balls deep up her husbands ass.
She shouted encouragement to me and I gave him precisely what I'd given that first time. I was fucking him so hard I didn't notice him cumming at first, but I did when his wife got in between us and sucked up his cum.
I came seconds later filling the condom inside of him.
Although we did meet up outdoors after my mom began to walk her dog, I began to meet them at their home. And for just over a year probably once a week (Depending on my studies) I would go and visit them for sex. Most times they were both present, other times though it would be just her or him. And I would fuck them both any way they wanted me to fuck them.
Meeting a girl my age at college, was the reason I stopped visiting them. But it didn't on a couple of occasions over the next two years, stop me from fucking him when we'd meet by accident. I enjoyed those times as it would be spontaneous and the sex was hard and immediate.
Since those times I've always enjoyed sex with both sexes, and have recently been the passive partner with a guy I work with. He's like me a bisexual man, but unlike me, he's married.