My attraction to feet is certainly rooted in DNA. I've been attracted to feet for as long as I can remember, and in my opinion the theory indicating that the brain crosswires genital nerves in the brain with the nerves in the feet seems to be most accurate.

Female feet are the sexual object for me, breasts / ass are worthless sexually (though they are important secondary sex characteristics, they cannot give me an erection).

Seeing a girls feet is quite literally seeing her naked, she is fully exposed to me sexually. As one can imagine this was distracting in school.

I like feet of mostly any size, small feet and big feet can have their own upsides and downsides. They can be slender or thick (thick can turn me on a lot), they should be soft and proportionate with a nice nail shape. Bonus points if the soles have a discolored pigmentation like orange / red / pink, this often can go up onto the toes too - massive turn on.

I think most people prefer polish, personally i prefer unpolished toenails which is an extension of preferring girls with less makeup overall. Just cute natural feminine toes.

The fact that something so mundane can turn me on so much is incredible. Feet are hidden enough to be taboo but not socially unacceptable to be exposed. It's also hard to get, I have to chase them when a girl constantly wears sneakers or boots (almost guaranteed to apply to any girl I chase), so it creates great dynamics.

Around age 11 I discovered airport security and the requirement for passengers to remove their shoes. Now, when I meet a girl I always want to see her feet and in school I knew exactly what the feet of nearly every girl looked like, except for the rare elusive girls who never showed them. The concept of a girl not wearing socks and having to take off her shoes to systemically expose her feet (i.e. to a metal detector) is to me the god of all time.

When I think of "airport" I don't think of planes, my mind immediately switches to "airport security" and the girls take off their shoes to walk barefoot. At about the same age mentioned earlier, I discovered airport security. I started collecting photos of celebrities going through security barefoot, and I have probably around 4,000 photos and over 140 sets after collecting for almost a decade.

When attractive girls have shoes without socks, nothing is more exciting than seeing a girl take them off to reveal her bare feet, especially if she looks uncomfortable or embarrassed.

To me it's super valuable to see a girls feet, and the more she hides them the greater the desire is. If I'm entering a relationship with a girl and I have yet to see her feet, what I'm looking most forward to besides secks is simply being able to get a good look at her bare feet.