this is another long one (short answer: incorrect assumption)

ace (being asexual) means a lot of things to a lot of people. to me, specifically. it's for a few things. i consider myself sex-repulsed; the idea and act of sexual intercourse grosses me out. same with male and female genitalia: no thanks, i'm good. seeing naked body parts doesn't do it for me, and the more detailed the image is (e.g. drawn, photorealistic, photograph) the more i don't like it. never have.

but attraction and arousal isn't just sex and intercourse. i find the femme body shape appealing (among other things), and like big curves. plenty of examples on my 18+ account.

someone else's experience and identity with asexuality may (will) differ, and even mine can day-to-day. but that's what it is for me.