system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is mint the optimal flavor toothpaste and mouthwash?
gpt
We strongly associate the sensation of mint with coolness & freshness. Naturally, toothpaste/mouthwash companies want you to feel fresh when you use their product, as that will make you trust it more - so they flavour it with mint.

Mint contains a compound that is sort of the opposite of capsaicin (found in chillies) - it tricks your body into thinking it is experiencing cold.