Fetishes and paraphilias are taboo in our society.
Many people have them, but they seem them as embarrassing and as things they need to hide. Some of them are seemingly harmless; some are just gross; and others could even get you in trouble with the law.
It's amazing what our minds can cause us to derive sexual pleasure out of. We may not understand why we are attracted to certain things, but there is usually an underlying cause that gets imbedded in the brain at some point in time.