I honestly think their dislike towards yaoi is mostly irrational tbh. Like, they just see two men liking each other and instantly shy away from it due to being used to staying away from anything that might label them as gay due to societal pressures labeling that as a bad thing.
I doubt most yaoi haters ever tried to rationalize their hate.
I doubt most yaoi haters ever tried to rationalize their hate.
They probably also feel that it emasculates them for possibly taking on the 'female' role and not getting to stick their own manhood inside - which defeats the point of the male organ existing, etc...
These are just hypothetical reasons, though.
'-'
X