The only definition I could give to that term would be if you thought cis gendered people were inferior to trans people. You were sexist against cis people, in other words.
What they apparently mean by the term is something I’ve actually thought a lot about, though. I know that I actually have a revulsion response to a penis, and it is one of two things that takes someone who would otherwise be attractive to me and makes them unattractive. A “feminine” looking guy could be attractive to me if he didn’t have a penis. The other thing is a lower voice. The one that rides the line is hairiness, which can get to be too much, but unlike the others, can be offset.
Is this culturally ingrained? I don’t really think so, because that suggests that sexuality is culturally ingrained. The revulsion I feel for a penis is the same revulsion I feel towards the concept of being attracted to a man–even though I fully acknowledge that this is a hot girl with a penis.
That said, I am working on it, intentionally. Because I don’t want to say I didn’t try. I can’t make myself attracted to penises, I don’t think, but I do think I might be able to ignore them.
So, yeah, enough talking about myself. The one thing I don’t know is if I am normal in this. Or is this just me? But, based on how I seem to be, it doesn’t seem to be some sort of bigotry, but a sexuality. It would be like calling a guy misandrist because he doesn’t want to have sex with men.
And I’m fully aware of how completely unfair this is to trans women who don’t want to have an operation. That said, there do seem to be a lot of men for whom a penis is attractive. A lot of men who insist on the biggest and best penises in their porn. And then just men that seem to have a “trans fetish”–though I wonder if calling it that makes trans women feel exploited or not.
So maybe it can be okay without feeling the need to fight this “cissexism.”
I do know one thing: I have a foot fetish, too. But it doesn’t work with men. But it does work just fine with trans women, as long as the penis isn’t visible. So it’s not that I don’t see trans women as women.