For me as an F/F fan, I want to imagine being made into fat on a pretty girl, making her even more attractive and voluptuous
I avoid male preds because I feel that those traits are the exact opposite of what I like seeing increasing on the predator. instead of growing more feminine, a man will grow more hary, beefy, and etc. he might grow round, but roundness doesn't lend itself well to maleness. Its true that I am not attracted to men, but I enjoy being dominated by men, so for vore, the aspect missing is that there isn't something cute underneath that I can make cuter. This is probably why I can handle many types of male predators who are animals, Snakes, frogs, lizards, etc. If these creatures are referred to as male it doesn't really bother me.
Honestly, it's probably lowkey homophobia. Any guy in much of modern (american) society has to deal with homophobia to a degree. Even straight guys get called gay all the time over dumb shit. For some people that homophobia manifests in being sickened by the sight of guys sexualized in any way, even if they are fucking/eating girls.
Did I crawl through a portal to resetera?