system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why does hair so readily absorb smokey odors that last all day, but shampoo smells only last a few hours in hair?
gpt
Cigarette smoke, and particularly the tar inside of it, is sticky as hell. Your lungs don't magically grow tar on them, they absorb it from the smoke because the tar sticks to your lungs. It's going to stick to your hair, too.