Why are humans called naked apes, even though we have hair follicles all over our body?Where did our

Soleil Noir is correct. I would only add that having less body hair may have actually been an evolutionary advantage. Hair can harbor lice and parasites of all kinds. As humans became less dependant on hair for warmth and protection, we also became more social, living in larger groups with higher population densities. Such close proximity would have made these communities effective breeding grounds for skin parasites and the diseases that they carry. Early humans who had less unneeded hair would have stood a decreased chance of contracting these diseases, thus having an increased chance of survival and reproduction.

Why are humans called naked apes, even though we have hair follicles all over our body?Where did our hair go?

On your butt.

Why are humans called naked apes, even though we have hair follicles all over our body?Where did our hair go?

It was no longer needed for protection so much; so there was no negative consequences for mutations that caused there to be less (or finer) hair. It allowed for those otherwise-defective genes to spread through the genepool.

In a similar way, since technology can compensate for human deficiencies much faster than evolution can, we'll probably see defects such as near-sightedness, diabetes, astigmatism, etc. become much more common in the future, since it will have much less impact on an individual's survivability.

Why are humans called naked apes, even though we have hair follicles all over our body?Where did our hair go?

I don't think I've heard the term naked apes before. I would assume that we are called that because we have far less lair then apes and the hair we do have is usually very fine. Humans don't have as much hair because it was not a necessity in our evolution.

Why are humans called naked apes, even though we have hair follicles all over our body?Where did our hair go?

At some point, hominid chicks preferred dudes who weren't so hairy. So, the less hairy dudes had more children. This is called "Sexual Selection."

Why are humans called naked apes, even though we have hair follicles all over our body?Where did our hair go?

As you indicated, we do have as many hair follicles as chimps. The hair is there, it is just fine and short. Most paleoanthropologist believe the best explanation for this is that our ancestors were persistence hunters meaning they wore down their prey. The lack of hair as well as very efficient sweat glands, and our upright posture minimizing solar radiation and maximizing wind removing heat, resulted in a creature that was very good in cooling itself compared to most animals. Because we could cool ourselves effectively, our ancestors could outrun their prey over great distances. We did evolve from apes and in my opinion any objective analysis would categorize us as apes. Some have theorized that once we started wearing animal skins, we no longer needed hair. This may be true to some extent though there are are peoples in the world who still wear very little clothing.

Why are humans called naked apes, even though we have hair follicles all over our body?Where did our hair go?

You've had some excellent answers already, and here's an additional suggestion: Vitamin D is vital to normal health but it's very difficult to get enough from our diet alone. So, we need a certain amount of exposure to sunlight in order to manufacture our own vitamin D. A less hairy human will be better able to make vitamin D from sunlight, and could therefore be healthier than a very hirsute individual. Thus, in the right kind of climate, reduced body hair could be an evolutionary advantage.