I thought I saw somewhere that the nerve center for feet and genitals were right next to each other in the brain and sometimes it gets “flipped” or the pleasure center is “expanded” and includes the feet.

Same what makes people get horney by being beaten, spit on, shat on and other stuff. At some point in our childhoods someone did it to us and we interpreted it as love. At least that is how it works for most.

Hey, you get the joke!

How much would you charge for five minute video of you stepping in raw ground beef?