system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do pimples not turn into little waterballoons when we sweat?
gpt
The simple reason is that pimples aren't blocked sweat glands. Your skin has another type of pore that contains your sebaceous glands. These produce an oily substance called sebum. These are what form pimples when they get blocked up; sebum is much tastier to bacteria than boring old sweat.

Sebum is part of your first line of defense against infection; it generally makes your skin a much less hospitable environment for the kinds of pathogens that make you sick.