system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does water seem so cold in my mouth while i chew gum?
gpt
When you have "cool" water (say, 10C or 50F) in your mouth, it is draining heat out of your body at a certain rate. If you have ice water in your mouth (0C or 32F), it is draining heat out of your body much faster.

Menthol (what makes things smell minty) is an irritant that increases blood flow. More blood flow means a faster exchange of heat. So the cool water is now draining heat out of you much faster, and your brain interprets that as meaning that you've actually got ice water in your mouth.