Mama's a pretty friendly seeming snake, when I first got her she was more nippy but she's used to being held or having hand in the tank since I have to change the water more with her, she likes the water dish as a toilet where as Snakey has a little corner he likes. She has bitten and let go quickly, not recently though. When she bites she does try swallowing and i don't flinch when she does it anymore but she doesn't take too long to realize I'm not food, probably because I start giggling... it tickles a bit when she bites and isn't clamping her teeth down on me hard :P I have longer nails now too so when she feels my nails she lets go.