Depends on what type of conversation you're trying to have. Are you saying it just to let them know. Or are you inviting someone new over for dinner?

It can be really hard regardless of the gender of the person you are currently with. A lot of people for some reason will not accept that sexuality is not always black and white, and that for some, they can have an attraction to both sexes just the same. Some people go one step further and don't find an attraction to a specific physical trait like sex, but rather, develop a sexual attraction based on the personality of the individual, regardless of their sex.

So it's a bit of a touchy subject in a lot of cases, as not everyone is willing to accept that you can have an attraction to or even feelings for more than one gender. On one hand, it's always best to be honest and true to yourself, but at the same time, you don't necessarily want to put yourself in a position where you have to deal with the limitations of other people's minds or thinking.

If you love him, I think it's important that you be honest with him. He may not be able to accept such a thing, especially at first, but if he truly loves you as well, then such things shouldn't make no difference in the dynamics and trust between the two of you. A true partner will always stand behind you, regardless of whether or not they believe in such a thing. Also, in a true love situation, your happiness is the most important thing, even if it means having to come around to and accept that what makes you happy is something or someone other than them.

I would like to buy I'm married to my same-sex partner and he doesn't believe in bisexuality.