Our snakes know us primarily by scent & touch, just as they know each other that way too. I don't think they care so much if we're shaking: I've been in some pretty big earthquakes & happened to be holding one right at the moment one hit, & he paid NO attention at all, lol- he still felt completely safe with me. But it's HOW we hold them, partly how supportive we are, but also by our grip- they don't like being held too tight & that's a very common mistake that people make. The "right touch" goes a long way whether it's a snake or a date, lol.