Yes my background is much the same as yours, it seems. From early on, I had a love for cocks which I hid in the back of my mind until, at 50, I had been without sex for years, and in depression. The wife was off sex, and still is. She suggested I look around for a playmate. She wasn't too keen on my finding other women but was quite OK with a guy and I. I wanted a friendly guy, someone I'd like as a friend who just wanted to get off just sucking and pulling, no pressure. I did eventually find a friendly older guy who did just that, no anal, and I let him suck me a lot. Then with another friend, I started sucking cocks myself and I knew why I loved cocks. We all had the greatest fun helping each other lose a few loads.
Being married for ever, our sex lives have slowed quite a bit, however it get's rekindled when we bring in a 3rd person into the bedroom. My buddy is often the one she sleeps with when I'm not home. We get pretty wild the 3 oof us. Thursday afternoon I was able to hook an earlier flight home and arriving at home I walked in to find them in bed and he was putting the meat to her. She saw me walk in and he never missed a beat, my cock was hard as hell watching her ass ripple with every thrust of his hips. I was naked in a heartbeat and he pulled out and she got on all 4's on top of me and sucked my cock as he went back to work and me licking her clit and tasting his balls she bucked a few times before squirting all over my face just as he unloaded in her. The combination of her juices and his cum leaking onto my face was more than I could take and I lost it. FUN Fun Fun
I always had same sex fantasies from puberty. But I never came close to acting on them, and would have run from the room in a panic if any guy had ever made a pass at me (tho in hindsight, I think I few did and I was too clueless to figure it out). It took decades, but I finally started tentatively exploring my bi side in baby steps. The first ones were sitting in hotel saunas while on work trips, playing peekaboo with the towels, trying to figure out if someone was interested but never feeling confident enough to find out. There were a few instances where guys outright jerked off in the saunas and I watched (along with others) but I always maintained behaviour that was plausibly deniable, in case an employee burst in (which actually happened once, and the other guy ran out). Eventually, sex at home with the wife dried up, and I got up the courage to try an actual gay sauna for the first time. That's a story for another time tho. Later, my wife and I started swinging, and we both incorporated bi play in our fun. However, I've never told her about my solo MM activities.
My wife is beyond the changes a woman goes through. She seldom wants sex, but she loves to watch me getting fucked by our man. Sometimes we share his cock with a tag team blowjob.
Wife and I are swingers. One night the wife of another couple made the comment "now it's the guys turn". I heard it, brushed it off. When we were in car I asked the wife did you hear that? Next time we met I sucked him off. Fast forward to last night well it happened again but this time it was a different couple. I was having performance issues next thing I know the husband and I are rubbing cocks, quickly turned into him jerking us off, then we get on the bed I start sucking him off and jerked me off. All while the wives stood there watching. Crazy hot night!