I think this is a good topic to discuss with a therapist. I am bisexual and have always been, never really had a "coming out" period, just grew into it during my adolescence naturally. Later, I found that I really identified with a queer gender identity. I have a tendency to be more drawn to men mentally but that's a different phenomenon... The way the bi thing manifests for me is not that I need both a man and a woman at all times, I more have periods when I am interested in one gender more, then the other, but primarily it's the individual not really their sex/gender - I am just physically interested in both.

It is a cliche but in my experience true: many (most?) men find women-women sexuality and relationships interesting and appealing. I personally never dated a man who did not and it does not just mean porn or threesomes - they tend to be quite curious about even just my feelings and experiences. If you have never brought it up to your husband, maybe discussing a book or movie with LGBTQ themes might be a good starter?

I definitely don't think one should suppress these kinds of interests, especially not in today's society that's so open to them. For me, it is not a minor thing, my gender identity and sexual orientation are big parts of who I am.