There was an experiment done by these guys called Watson and Raynor on this baby named Albert where they introduced a rat and then scared the baby with a loud clap when the rat would appear. Eventually Albert became scared of rats because of the association with the scary stimuli that followed. But he started to generalize the fear and eventually became scared of everything small and fluffy, including teddy bears. Apparently he spent his whole life scared of them. I think that shows that we can learn to be scared of almost anything.
Now 100% herp free!