Hormone like substances called prostaglandins
Answer:
When my dog died, I told my friends and they just laughed it off. If I was given sympathy, I would have felt better about it and get over it quicker.
(This is not a real-life situation for me, so you don't have to use it)
I believe this to be very true.
As I read other peoples work, I tend to see how they see and think differently than I do. It's very interesting, actually.