Humans are inherently prone to attach fear with snakes. It's actually been proven in psychology studies that it is harder to attach a fear to say a flower or elephant than a snake or spider. We have an instinctive bias to become scared of snakes easier than other things. I actually wrote a college paper about it recently. My girlfriend is finishing her doctorate in psychology and helped me build a strong arguement about our irrational fear of snakes. It is a very interesting topic. We spent several evening having some great discussions about it while I was shaping my paper up.
Regards,
B