I'm assumed to be open to ANYTHING, like bisexuals are a blank slate to be painted on... I've gotten numerous offers for kink/BDSM and many other things...

What I've seen is that a plethora of people who are into alternatives such as BDSM do identify as bisexual, as opposed to a general-population breakdown of sexual identity. Or, in other words, why is it that "bisexuals" commonly have something else going on? Which isn't to say that there are no plain bisexuals out there, obviously there are. Put yet another way: sample sexual subcultures, find a multitude of "bisexuals."

It begs the question "why?" Are they bisexual or... are they into their "thing" and sex (male/female) takes a backseat? There is this huge dearth of "bisexual community," but when you stick your head into one of these subcultures, "bisexuals," everywhere.

Yet, their sexual identity isn't leading with bisexual, it's leading with whatever their thing is.

Suppose for the first thirty years of your life you had a concept of apples and oranges. Then one day, someone hands you a lemon. That does not mean that your understanding of an apple or an orange was wrong, it was entirely correct. Still is: there are apples and oranges. But what do do with the lemon? It is more similar to the orange, but it is not an orange, and it is certainly not an apple. Is the lemon an orange? Or does the new-found lemon mean that perhaps so far, you've been right, but there are other things one must consider?

Or you could be naive and just say, well the lemon is most similar to the orange, and after all, the Nobel committee in 2021 awarded one of those coveted awards to some researchers that demonstrated that the lemon and orange scents/flavors are just identical but mirror-image molecules etc., so, they're the same thing.

But this would not be entirely your doing. What is better? To admit to oneself that they have a deep-seated, immutable, atypical sexuality or to join the ever-growing, celebrated Parthenon of letters? That they are bisexual?