I can honestly say...not really. I'm used to some wild women, and my Thai wife is about as exciting as only having a 50yo pussy, sit on my face...with NO reciprocity of any kind. That's why I now have 2 suck buddies...a Thai milf hottie and a fellow, married, Dutchman
Sex for me is done, unfortunately. However, when we were going at it, it was great. I didn't embrace my bi side until my late 40's (I've been curious about dick for longer than that). Even now, if the opportunity came up to indulge in a nice thick veiny dick I would definitely do it as the urge is still there. At least for the experience.
I am very happy with the sex my wife and I have. Not as often as years past but she just turned 66 and I'm 72. We still have the passion but not as much energy. She knows I have a male friend with benefits that I get together with once a week or so and she is fine with it. He gives me something she cannot. With him it's strictly sex. We both enjoy it but but we don't kiss, hug or cuddle. We get that from our wives. If my wife and my friend were both naked and laying on separate beds, I would choose my wife probably 80% of the time.
My wife and I still have an active and wonderful sex life. While not as often as we once were, the sex is as diverse and satisfying as ever.....but it cannot fulfill my need to have a man's dick in my mouth. I crave the feeling of taking a man from flaccid to hard...and sucking him until he cums....swallowing it all until his well runs dry.
My second wife and I entered into our union with full disclosure, and we were old enough to know ourselves. Our covenant included: We're both bi, We're not monogamous and we suck at it anyway, We happily will invite women, men, and couples into our bed, We swing, We go to oodles of parties, Communicate, communicate, communicate!, No surprises. It was abso-fucking-lutely beautiful until her lymphoma came along.