system
Given the following post, respond as if you're commenting on Reddit:
human
Why do aerosol cans become cold when they are shaken?
gpt
Metal things at room temperature tend to feel cold* because they conduct the heat out of your hand when you touch them. When you shake an aerosol can you are moving the liquid inside around so that it can come into contact with the heat of your hand and absorb it.

edit *colder than the surrounding air which is also at room temperature.