How did feet worship become a thing?
There are a few various theories on how feet praise-- or podophilia, as it's often called-- became a thing. https://creaturesincrisis.org/?p=2168 One theory suggests that it's a kind of eroticisation of the power differential in between individuals. Simply put, individuals discover themselves brought in to others who they perceive as being 'above' them in some method, and what could be a more extreme power differential than between someone who can squash your head with their foot and someone who can't?
Another theory suggests that it's a form of regression, or a return to a more 'infantile' state. This one makes a lot of sense when you think of it-- after all, the majority of us were presented to feet long prior to we were presented to any other body part, and for a lot of us, they were the first thing we found out to touch and explore. They're also a very non-threatening body part, so it's possible that people who are attracted to feet see them as a method to feel safe and comforted.
Whatever the reasons for people's individual tourist attractions, there's no doubt that feet praise is a thing, and it's a thing that individuals have actually been delighting in for centuries. If you're interested in trying it out, there are lots of resources out there to help you begin-- from books and sites to professional mistresses who can introduce you to the world of feet worship in a consensual and safe method.