system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why does beer smell good in a glass, but bad when it's spilled?
gpt
Beer smells and tastes good as long as it is fresh. It is horrible as soon as it gets stale. It gets style vers fast in contact with air and if it's warm. If you spill it, it will quickly become warm and have contact with air much more. In a glass, only the surface is in contact sich air. In a puddle, everything is.