Is it normal that my gf finds this repulsive?

My gf finds any photos / videos of guys dressed in women's clothing or acting in a girly way so repulsive, and almost pukish. While scrolling through insta feed or whatever, anytime a video pops up like that, she'll skip it instantly. I find it funny, like videos of guys spoofing or teasing girls by imitating their mannerisms. So just to tease her, I'll fwd it to her. And she'll get so pissed off. Now I stopped doing that. Is this normal behaviour? Is there like some sort of childhood trauma or patriarchal conditioning behind this behavior? Or is this normal and maybe I'm over thinking?