Have you ever thought why your pets (e.g. dogs or cats) are so furry and not yourself?
So far ther seem to be three major theories for human hair loss.
1. Our early ancesters had a semi-aquatic lifestyle. They losed their fur because it would be a disadvantage in the water.
2. We lost our fur in order to control our body temperature.
3. We became naked to reduce the prevalence of external parasites and diseases caused by them.