Shortly after my divorce from my first wife, I booked a trip to Hedonism III as a single guy. The experience was awesome! I fucked 4 women that week. I came back from that trip with a new understanding that sex can just be sex.
When I met the woman who is now my wife, I told her very early in our relationship that I would never be monogamous. She had always been bi-curious, but she'd never had any experience with the lifestyle, despite that fact that within her own 7-year marriage she'd been unfaithful throughout half of it, and she'd had 3 different affairs.
One night, I slid a butt plug up her ass and fucked her pussy. I told her to imagine that it was two real cocks. Within a week we had our first MFM threesome.
From threesomes we moved on to couples-play. She's fucked me and two other guys multiple times. She's bi-furious and craves pussy, but finding single females who are open to play has proven to be exceptionally difficult for us. She gets her FF fix with couples play. When we got married, we spent our honeymoon at Hedonism II and this winter we're going back for our third time together.
As time has gone by, I've found myself leaning toward bisexuality and the Hotwife lifestyle. When we do a threesome with another guy, I like there to be some MM contact. I love watching her fuck other guys. It's so hot to fluff a guy for her and watch her slide his throbbing cock into her dripping pussy and ride it until it unloads deep in her cunt. Then it's my turn to lick and suck her clean before I slide in for sloppy seconds to reclaim her.
She has a full hall pass to play with anyone at any time. The only requirement is that she tell me about it. She's played without me many times, and it is a huge turn on! When I'm out of town on extended business trips, she'll usually hook up with a guy or a couple. She's played with couples multiple times during the day while I'm at work. Several times when I had to work late, she's gone out with another guy and spent the night with him. And last Valentine's Day, she spent the afternoon fucking another couple before coming home with a well-used and full pussy for me.
The lifestyle requires total openness, honesty, and communication. These are all things that make any relationship strong, but when you're sharing your bodies with others, these are even that much more important. She and I came from first relationships where neither of us had been faithful. Now, we both get the physical sex we want with full permission. Why have an affair when you can just tell your spouse, "I'm going to fuck so-and-so tomorrow night."
My wife and I have an exceptionally strong relationship, and we attribute a lot of it to swinging.