lesbian vs. bisexual

this age old discussion came up at my work of all places today. they were talking about heated rivalry 🙄 and the scene where they're at a club and kissing women.

to be fair though, if my lover kissed another guy i'd definitely be more upset than if she kissed another woman. this doesn't have anything to do with non-monogamy, or control or whatever; just that it's an extremely hard smack in the face for her to be enjoying another man of all people, or even just subjecting herself to that to get to me. if it was as intentional as it was in the show, obviously

as a thought experiment though, that must be a good indicator of if someone is bi or homosexual, no? equally bothered by your partner kissing both sexes, in a same sex relationship - that's bisexuality lol