system
Given the following post, respond as if you're commenting on Reddit:
human
Do your pupils really dilate when looking at someone you find attractive?
gpt
There’s a lot of things that can make your pupils dilate, but one of the most classic reasons (which also applies to looking at your crush) is excitement. If a sight can raise your heart rate, give you butterflies in your stomach, or feel like your heart’s gonna burst, it’ll also dilate your pupils.

On the other hand, a very scary person also fits the bill, and can dilate your pupils as much as (or more than) an attractive one.