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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate. is a Interesting Fact in the Interesting Facts category.

but also ur eyes sparkle
when u love someone
i love greyden
n i love taylor lautner
It all has to do with the human's sympathetic and parasympathetic nervous system
d:
wanna know more details about scientific reasons...
can anyone elucidate me?