^^^ SSJMadara, There are actually several proposed scientific explanations why foot fetish appeals to so many people. You see, one explanation is that the part of the brain that triggers sexual arousal is right next to the part that perceives sensations we get from feet. Another hypothesis states that this sexual attraction is learned as a response to a reward. For example, even if you're not attracted to feet, you will likely get a positive feedback from your partner if you kiss their legs. After a while, just the sight of your partner's legs may cause sexual arousal.
But yes, I agree. You should go outside more.