Actually, my rat snakes would probably grab & wrap a snake hook...I don't want them hurting their mouths. The BCI I used to have grabbed my hook once...that's just
not pretty. That's why I like using a water spritz...totally harmless, like being in a rainstorm, but very effective. It startles them & changes their focus instantly.
I don't ever "boop" snakes on or near their head...when I use "touch" cues, it's on their body & they associate that with being handled, picked up. IMO, it's too
risky waving a metal hook near a snake's face if they decide to bite it...truly not good for their mouth.