Why do we sweat?

Answer: To cool body through evaporation

Skin needs to stay moisturized — Wrong. Sweat actually dries out your skin as it evaporates! Skin moisturization comes from natural oils (sebum), not sweat. Sweating is purely for cooling—the evaporation removes heat from your body.

To cool body through evaporation ✓ — Correct! Sweating is your body's air conditioning system. When body temperature rises from exercise or heat, the hypothalamus activates sweat glands. They release water onto your skin surface. As this water evaporates, it absorbs heat energy from your body, cooling you down. You have 2-4 million sweat glands that can produce up to several liters per hour!

To ward off insects — Wrong. Sweat doesn't ward off insects. It's a thermoregulatory mechanism controlled by the hypothalamus where water evaporates from skin to remove heat when body temperature rises.