MBK's are beautiful snakes. My girl was a little flighty in the beginning but she doesn't bite or musk. She did strike at me once during a feeding but it was my fault. My Cal King would musk a little when he was younger but that's about it in terms of defensive behavior. Your guy looks young so any potential bites wouldn't hurt much at all. If he is a little nippy just put on a glove and let him do his thing. Eventually he'll realize it's not doing any good and he should stop. Best wishes.