when you first buy them, they'll be pretty scared. that goes away after a week or two, as they get used to their surroundings. a baby is more likely to bite than a tame adult, just cuz babies are scared. mine tried gettin me a few days ago, but his mouth was closed so his nose just hit me.

snakes also get stressed when they're in shed. their eyes get all cloudy since they're going to shed their eye caps, and they cant see. since they dont know whats going on around them, they get stressed. plus shedding isnt very comfortable!