I've heard a theory similar to this... From what I understand, it's a survival instinct... Reason why a lot of us can't watch people throwing up or even smell of it makes us sick & makes us wanna throw up is because back in the cave-man days, if someone in the group that shared food threw up, they took it as a sign of having eaten something they shouldn't have so they all threw up just to be on a safe side... Again, not sure how true it is but figured if it was true, it's pretty interesting...
"A person eats around 60,000 pounds worth of food during his life which is the equivalent of six elephants." "Birth control pills designed for humans will also work for a gorilla."
Anxiety doesn't come from thinking about the future, it comes from trying to control it. Cutting people from your life doesn't mean you hate them, it simply means, you respect yourself.