>>11553713A simple game of logic will explain that.
Let's think back when we were monkeys walking around on all four, evolution had to point our little monkey brain toward the vagina.
What did we see in that case? Asses.
And this is how asses became the high priority sexual target.
Then we started walking on two feet, suddenly there was another position for sex making, the front. So boobs started gaining traction as secondary asses in our predisposition.
Why feet?
What do you see when you're taking a woman in doggy style position?
Ass, thighs, and feet. There you have it.
The reason people also like feet is because we have that doggy style genetic memory imprint burned into our DNAs by millions of years of evolution to make sure our penis get erect at an approximate proximity to the sexual target enough that we can figure out where to stick the penis in.