system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the sweat from the armpit smell worse than sweat from any other part of the body?
gpt
Armpits have **apocrine sweat glands**. These differ from sweat glands elsewhere on the body because they secrete oils in addition to sweat. The oils are then broken down for energy by bacteria on the skin, and the byproducts produce body odor. It's also thought that armpit hair helps spread the odorous chemicals into the air.