Captain Caveman is the most scientifically accurate depiction of homo sapiens in their natural state. If we never cut our hair or shave, our hair and beards would grow down to cover our whole bodies.
Secondary shower thought, an image of Captain Caveman should be the image representing humans on the Wikipedia page.
Tertiary shower thought, we probably started wearing clothes because our own hair used to be our clothes, and we wanted to replace the hair we cut off when we started grooming.