Bilateral amygdala damage can lead to a loss of fear and inappropriate behaviors.

“monkeys or people who have bilateral amygdala damage they can still experience certain kinds of fear for instance um you drive up CO2 carbon dioxide in their environment and make them breathe pure CO2 they will panic but they become um unafraid of things like snakes if previously they were afraid of snakes and they become kind of sexually and um uh food inappropriate so they'll pick up a pen and start to nod it maybe taste it normally we don't try and taste inanimate objects um and the monkeys would try and um copulate with various inanimate objects”