It all comes back to how bs and constructed sexual categories always were. Yes I mainly like girls and fem people and think they're just way better to be with than men, but why write off every guy on earth when I can just live life free to love? I'm fine sitting in a box bc it has pretty colors, but my box only matters when it suits me. The boxes never were innate, and never will be. So long as people get that I like women, they don't need to worry about me excluding men.
That said, saying these flexible girls are straight is like saying a person with my skin color and ethnicity is white. The category of "straight" functions in a similar way that is defined by historically powerful exclusionary norms. If you're not only ever into "the correct" people, you're a filthy degenerate failure who must kill off that part of yourself to be "straight." Girls who fuck girls cannot fit into that social order unless they deny that part of themselves. It's not enough to mostly like men, you need to conform
Women being gay: they were dear friends who lived together for the past 50 years, owned several cats together, never consorted with men, and are now being laid to rest under the same tombstone as it was their eternal wish never to part. What close roommates they were!
I didn't think Spinster was a derogatory term, it was literally a job title of something that women could do to achieve financial independence back in the days when men owned their wives.
No, it is not, and don't ever let anyone pin a sexuality label that isn't you on you. I am bi and Gen-X. In the 80's and 90's I took constant shit from homophobic straight people, as expected. What I didn't expect, and was truly hurt by, was my homosexual acquaintances calling me "closeted", "confused gay", or "a greedy f*g".
Sorry. I'm clearly still bothered by the bullshit from that era.
They're under the same umbrella, and are functionally the same thing. Bi is just compatibility with the same/different genders, pan is just compatibility with all genders. Bisexual as a term has had a long and confusing history (it essentially meant intersex in the olden days), so then another standard was created (bisexuality as we think of in the contemporary context) as the terminology evolved, then another standard was created on top of that within the last 30ish years or so (pansexuality).
So basically this, lol.
Scientists now just refer to the entire category as "Bi+" as future forks come out. You get to choose which flag you like best, and everyone knows you are on the universal compatibility standard x3