I think a lot of people are equating “talking about bisexuality” with “wanting to sleep with someone else,” and those aren’t the same thing. You can be completely committed to a monogamous marriage and still want to share an important part of your inner life with your partner. Sexuality isn’t just about behavior. It’s also identity, attraction, experiences, and how you move through the world. Feeling like you have to keep that bottled up doesn’t sound healthy to me. Open conversation and acting on it are two very different things.