I had a boyfriend long before I ever had a girlfriend so yes.

My wife and I would actually watch porn movies together and actually have sex along with the actors in the movie. Over the movies we rented, every scenario would play out on the movie. I'd just look at her and ask her if she would like to do that. Or maybe try some things from the movies. Some things she liked. Sometimes she would go to the porn shops with me to buy some items we needed to play out what we had seen. In the end, it all faded, and we were just a man and woman having a nightcap before we slept.
I have a partner that just loves taking cock in his ass. He can't get enough of it. He does cross-dress. Way beyond wearing hot undies. He'll come over to my house wearing the hottest dress, making me instantly horny. He wants to transition so bad. He's married to a woman because the culture he was raised in told him brutally that he had to marry a woman. He's so cute and naturally at ease when he dresses for me.
Her girlfriend would take her to the private salon for women of her sorority. You were either a member or former member to get in. Or you were a romantic partner of one of the sorority's ladies. Most every trip to the salon ended with an orgasm. Maybe several. Groups from certain classes would schedule a day they could all go to the salon together. They had walls and doors like a dining room in a restaurant they could close for a group or party. The ladies went into a changing room and only wore a silk robe and flip flops in the salon. They didn't exactly stay closed, nor was any effort ever made to cover anything up that may become exposed. One day they had massages with Japanese lesbian women driving them through a massage with several orgasms. As expensive as it was, it seemed not to be so bad when she would come home horny.
I remember staying with a man on a blistery cold January weekend. We slept off a heavy night of drinking together and woke early needing to piss. We came out of the bed around 7 AM and he stoked the fire in the stove, and we had some moonshine spiked apple juice looking out the window. Temps were on the low single digits. We went back to bed, and we began a kiss that stayed on for at least 10 minutes. I began jerking his cock as he did likewise to mine. There was some serious passion in this, and we were kissing and moaning into one another's mouth. I began to cum, and he pressed his lips tighter to mine and I was screaming as it was so intense. He began cumming almost instantly and we continued the marathon kiss. I finally raked his cum off my belly with my hand and broke the kiss to lick it off my fingers. He did the same and we began another long kiss that I fell asleep on.
We had many threesomes. Always with her girlfriends. I was the only cock in a few lesbian orgies she had at our home. One night while we were having sex at bedtime, two other married couples were having sex in our guest rooms. We were in several full swaps. Never a full-blown orgy with members of both sexes participating until the last year we were active. It was a large event at a private estate that was gated. My wife was able to get us access. We went in the home, and I don't know that I laid eyes on my wife until the next morning. I woke with 2 women in a rather large bed, one of which gave my cock a morning ride.
I'm on a popular gay dating app and I'm approached constantly by married men peeking out the closet door. I can't count the number of married men that have hit on me. Many are stepping out for the first time. If I can get them naked once, they tend to open up and have fun with it. I've stirred a few local men, and they sneak around, and they all have me to thank!
Several years ago, I was fucking a gay married man as he came home from the late-night shift. Some mornings we fucked. Other times, he was too tired, and we would make out intensely and jerk one another off. I had nor have I to this date, ever felt a grip like his. It actually hurt but hurt so good! I could feel his grip throughout the day and on a few occasions, the next morning! And I would masturbate several times until the feeling went away.
The first time we did this we were hiking in a public area that would get heavy use on the weekends, but not so much through the week. I believe it was a Monday. We both took backpacks. We had a nude picnic with some delicious red wine. I dropped my clothes. She was hesitant until she had a single drink. Then she was totally chill, and everything came off. We had sex on the blanket and fell asleep until a popup thunderstorm woke us. We were under a cliff, so the rain didn't get on us and we ended up having sex again during the storm.
I've always been more of an ass man. But a few ladies over the years have had major tits. And I must admit, I would indulge in them. A female coworker would let me come to her place and for a few chores she needed done from time to time, she would have sex with me. I always fucked her from behind with her facing the mirror so I could watch the show. They were so big that even in doggy position, her nipples were into the mattress. They didn't flop, rather a roll went down them. After a few years, she had them reduced and she still sported a set of DDs.
I highly recommend them. Especially to inexperienced men. If the right one is used correctly, it becomes and equalizer tool. Guys who cum too soon can hold up longer. If the ring has a thick bumper that bumps her clit with every thrust, it makes her orgasm quicker. Having the mutual orgasm at the same moment is the goal.
I worked the second shift at a local facility with a heavy mix of married men and women, many in their twenties and thirties. Shift would end at 2, many times later. There was a lot of things going on in the cars late at night. Friday nights were an all-out party. I don't think the bonds of marriage applied.
I recently started doing this on the suggestion of a gay fuck buddy. It's incredible how my cock feels in my pants when I first shave. Almost everything is more of a sensation than a feeling. In other words, I have more erections for no obvious reason! But the ultimate pleasure was letting him suck it after I had shaved. I never realized how much my feeling my pubic hair was absorbing.
I was with my girlfriend at her mother's place. My girl started drinking rum. Pouring it down until she passed out. I picked her up and laid her on the sofa. Mom was kind of hot, and she seemed to have a spark in her eye as she realized I didn't have an able partner for the night. Oh yeah. I went to bed with her mom and had several rounds with her while her daughter was in the next room drunk on her ass.