The human body is pretty amazing. It's made up of hundreds of parts, each one with an important purpose. But there are some parts which may not have an obvious purpose – for instance, why do men have nipples? There's almost always a reason behind these weird parts of human anatomy.This list is full of weird human body parts and the reasons why we have them. Some of these are "leftovers," so to speak, from when we used to live in different environments, or from when we were developing in utero. Some of these organs have multiple theories about their actual purpose, and some have been figured out for years. What are the reasons for weird human body parts? Find out below!