Yeah sorry, I'm gay & when I do meth, I don't think about women AT ALL...
You're disgusted because you're ashamed. We live in a society that paints gay men & men being sexual together as "icky" and "gross" and "weird". And if you're ashamed, you're less likely to act on "gay stuff" when you're sober.
I don't think Mr. Krinkle denies that people's sexualities are on a spectrum, but by "a little gay", he means you have to have some GAY in you in order to do that in the first place. Does it mean you're gay? No, you could be bi or 90% straight & 10% gay (which is still a type of bisexual IMO).
I mean after all, you describe the stuff you like as "gay" too, so if you like "gay stuff" (sober or not), then yeah you have a little bit of gay in you.
I'm sorry but I've done insane amounts of meth in my lifetime (at least 20+ years, thanks to being gay & coming across it from other men so often) & not once have I ever thought about or got turned on by women. Sure it makes you a huge pervert & sex addict, but it shouldn't be "changing your sexuality" on a whim like that.
People who use this excuse are probably already slightly bisexual (or even fully in the closet) and meth takes away their ability to hide it anymore (since it makes you so horny), but then when they're sober & able to repress themselves better, they go back to saying "naw, I'm straight!"...
In the wise words of Mr. Krinkle..... "Cmon!". A fully straight man does not get turned on by or aroused by another man typically. And I'm severely doubtful meth just changes people's sexualities, rather than un-inhibits their already repressed desires & allows them to act on them.
I'm gay & some times I feel gross too after I nut with dudes, that's just post-nut clarity, it doesn't mean "Oh I feel gross so this means I'm automatically straight then".
I actually hate this line of thinking because it implies that "gayness" is just some sort of side effect of something, like an illness that people get if they do bad things (like drugs). Which is kind of insulting to openly gay people who aren't ashamed of admitting they're attracted to men.
Do I think men will some times experiment & can still be straight? Hell yeah, but experimenting & then deciding you don't like it is a hell of a lot different than "I go gay every time I get high".