system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does it feel good to be clean?
gpt
Oils that occur naturally on your skin combine with dirt from the environment to create a layer covering your body. This layer changes the nature of tactile sensation you receive from the environment (eg, clothing, armpits, light breeze, etc.). Furthermore, this layer reduces your skin's ability to diffuse body heat by inhibiting sweat evaporation and radiant conduction.