system
Given the following post, respond as if you're commenting on Reddit:
human
Why does a liquid run down the side of a glass when pouring it?

When I pour a liquid from a mug into another container, it runs down the side of the mug. Why does this happen?
gpt
Due to both the high surface energy of the ceramic surface and the lower interfacial energy of the ceramic-water interface. 

The lowest energy state is when the water is covering the ceramic and so the water will adhere to the mug as it is poured out.