My wife and I have a solid, loving, and supportive relationship. We entered into marriage as swingers and we were both bi. As time goes on, sex between the two of us has waned as have our lifestyle encounters. Personally, I fantasize more and more about our sex with other guys. I love fucklicking her clit and his balls as he fucks her doggy-style, and I fantasize about it as I masturbate.
I'm bi and I've become more comfortable with it as I've gotten older. I love my wife and I love making love to her when we get around to it, but I also am increasingly interested in MM physical sex. My bisexuality is only physical. I have no interest in anything emotional with men, but I like cock in my ass.