There are a couple of different theories on how feet praise-- or podophilia, as it's in some cases called-- ended up being a thing. One theory recommends that it's a type of eroticisation of the power differential in between individuals. To put it simply, people find themselves drew in to others who they perceive as being 'above' them in some way, and what could be a more extreme power differential than between someone who can crush your head with their foot and somebody who can't?
her explanation Another theory suggests that it's a kind of regression, or a return to a more 'infantile' state. This one makes a great deal of sense when you consider it-- after all, most of us were introduced to feet long before we were introduced to any other body part, and for much of us, they were the first thing we found out to check out and touch. They're likewise an extremely non-threatening body part, so it's possible that individuals who are brought in to feet see them as a way to feel safe and comforted.
Whatever the reasons for individuals's private destinations, there's no doubt that feet worship is a thing, and it's a thing that people have actually been enjoying for centuries. If you have an interest in trying it out, there are plenty of resources out there to help you start-- from websites and books to professional girlfriends who can introduce you to the world of feet worship in a safe and consensual method.