Might help also to describe what you think feminism is, since it’s one of those terms that is overloaded.
I once had a physical therapist tell me she wasn’t a feminist because she thought women couldn’t be as physically capable as men when serving as soldiers, and seemed to believe feminism requires treating women exactly like men.
I told her I was a feminist because I believe in equal rights for men and women, an idea she did not seem so opposed to.
The Cynics (notably Diogenes of Sinope) also advocated for sexual relations between relatives (such as brothers and sisters), since incest norms were socially imposed and thus “arbitrary” in the view of the Cynics.
Diogenes also died after eating a live octopus, which is amusing.
Either way, love Cynicism (incest aside and all), cheers!