All organisms are evolved to maximize their chances to pass their DNA into the future. All animals have a hardwired set of behaviors that over millions of years on average have done reasonable well in this regard. It would therefore be not only astonishing but biologically impossible if we were not hardwired with a distinct set of mate preferences based on utility. It's amusingly fashionable to pretend otherwise, but such silly lightweight "opinions" have no more validity than imagining that we were created by some invisible magical pixie or that we humans are magically "different" from all other creatures.

So, putting aside transiently fashionable babble about "socially-created" preferences and suchlike, it's obvious that we will look for some key attributes. Firstly, symmetrical features, good skin, and good hair. These are difficult to achieve and point to (i) great genetics, and (ii) great nurturing. Next up are signs of fertility: perky breasts in women. Key attributes for men include height (always a woman's greatest preference regardless of age and culture).

Muscles etc. depend on the circumstances. Women living in dangerous environments prefer muscular men because of their capacity to protect; women living in safe environments prefer more androgenous men because they are safer to live with.

There is thus a combination of factors at work, but they are all biologically determined. Only the most trivial are due to social influence, and we know they are trivial because they change so often. Hardwired preferences never change.