btw heterosexual and homosexual aren't mutually exclusive, they're just two positive types of attraction without implying a negative attraction, it goes like this:
heterosexual = attraction to female(s)
homosexual = attraction to male(s)
bisexual = attraction to female(s) and male(s)
asexual = no attraction to anyone (but there is a spectrum between "sexual" and "asexual", termed "greysexual" by some)
"straight" = exclusively heterosexual
"gay" = exclusively homosexual
"bi" = bisexual
"ace" = asexual (+ "grace" = greysexual)
(Yes, if you like 3,333 females and only 1 male, you are 100% bisexual by definition. Likewise if you like 4,321 males and only 1 female - "gay" guys don't seem to grasp this, more than anyone. You can qualify it if you want, but definitions are definitions, and if you care at all about the meaning of words, you will maintain this.)
As far as I am concerned the above terms and labels exhaust everything we can think or know about human sexuality, on a purely descriptive level.
Furthermore, does that mean most people are bisexual? I guess that's up to you to figure out for yourself, more than one to make such a judgment. Most people's minds are closed because of the Western cultural values they grew up in, and this is an extremely specific and repressed kind of ideology, one which goes against thousands of years of human promiscuity and sexual flexible documented in Ancient Greek, Roman, Japanese, Viking, and Native American cultures, and many more.
And no, this is not a meme, or a troll, these are just facts. I hate to lay them out for you like this, but here we are. Good day to you.