"And people can't help what they do or don't find attractive, whether that's down to socialisation or not."
"and if we find something unfamiliar, we might just not find it attractive."
Okay, that is the key for me, this feeling, most;y subjective, that we find something attractive or not. Whether it is ourselves or others. Claims that people can't help it -- I just think back to, say, the fashion trend of the eighties, or seventies, or some other embarrassing era, where things we might have considered attractive or desirable then, we would now find hideous. Very few attractive things are even labelled timeless. It's all mutable, once you get beyond the clear-skinned, looks younger and symmetrical stuff. Which is basically biology (have you got good genes, no significant parasite load, sexually mature but not too old and decrepit to reproduce successfully?).
Although the claim, 'I just don't find it attractive/I just find x attractive', is often used (by lesbians in my examples), to explain why someone insists on a girlfriend with long blonde hair, or won't go out with a black woman, or won't go out with a fat woman.
It's the whole trained fascination with appearance and 'attractiveness', there's yer problem!