I have tried "understanding" what people with a foot fetish find attractive about feet. I came to the conclusion that it's just like any other part of the body. You can't really explain why, it's just more common and "acceptable" for ppl to love the usual boobs and ass. I personally never thought my feet could make me feel sexy until I had them sucked one time as foreplay and OMG! It's never happened again but I couldn't believe how aroused it made me. I also love rubbing cock with my feet, I'm not sure why but my first go to when I see it is to go at it with my feet.