system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does hot water taste so different to cold water?

Drinking warm or hot tap water almost tastes chemically by contrast to cold or chilled water. What is going on in the water, or is it my taste buds?

EDIT: Holy this blew up. RIP my inbox. Sorry I can't reply to everyone but there are some really good answers here from both biological and chemical explanations.
gpt
Taste buds. They have a hard time distinguishing the exact flavour of something icy cold. When it's warmer, they're more sensitive and can make out much more, in this case the individual chemicals or whatnot in the water.