The fear of feet is known as podiaphobia. People with podiaphobia typically become frightened or disgusted whenever they are around feet, even their own. They often don’t let anyone else touch their feet and sometimes wear shoes or socks all day and night so they never have to see their own feet. Like most phobias, the fear of feet is usually an irrational fear. Many people can overcome irrational fears with a cognitive-behavioral therapy tactic called systematic desensitization. This method can help people overcome fear by being exposed to their phobia triggers in a safe and controlled environment.
Above might be the reason for some people in our society to dislike anyone around them in bare feet.