Couldn't stay in a vanilla relationship

She was lovely, kind, fun, loved sex. But her values were we only fuck each other. Sweet and traditional.
But I've had too many past girlfriends wanting two or more men. Couples with slutty wives I fucked, dominated, gangbanged.
Vanilla isn't enough anymore. Sex was ok. She liked making me cum in her mouth. I could make her cum easily. But any talk about public sex, other couples, light bondage... was a no. I broke it off after two years. We're both late 40s. I don't want my last half of life to be boring sex.

I want to meet more couples who appreciate my experience and good manners when I show up and can fuck a married woman well, unlike the many fakes and flakes. Or meet younger women needing a man who respects, encourages and protects her in her journey.

Perhaps I sound uncaring that a good relationship wasn't enough, just because sex was lacking. For me, though, it's a real need to have occasional experiences with a woman who loves having two cocks in her mouth, or when a friend is visiting want to show him her pussy, or tease me how she thinks about when a few men fucked her in the past.