How do I know that I'm really bisexual?

I think that the answer will be that when you try it because by thinking we could accept both genders, the mind will react almost the same by thinking. but when you are in the situation you can only know. I also think it might be situational. some want to try and some want to act strangers. finally, they are terminologies and we only move with our heart and we should not judge anyone with such tendencies. Sex is a unique relationship between the two and we should not have that much interfering between them, we only accept and respect them. thank you.