When my wife and I were dating we both mentioned that we were curious about same sex intimacy. I revealed I'd had oral sex before and enjoyed it. It was scary being so honest when I hadn't told anyone but she was completely unphased. Lucky!
We've now been together for ten years and I've barely mentioned it again. I did ask whether she is okay with me masturbating with guys online (bateworld) and her response was "go for it", so I indulge in that regularly...but it's not the same. Almost everyday I fantasise about getting naked with a guy, especially sucking and swallowing.
Last weekend we went camping and on the way down I started listening to an audiobook about being bisexual and married. For those interested its call Bisexual Married Men by Robert Cohen. She asked me what I was listening to and then we spoke about it in a bit more depth. She emphasised that she's happy for me to explore that part of myself.
Finding the right person is the next challenge, but it's exciting.