I have to agree that is is quite normal for this snake to be head shy, protecting the most vulnerable part of itself is something that is ingrained into their survival genetics. Also agree that it may improve over time and may have to do with his current size, a yearling isn't very large and we are quite large to them, so i say yes it may improve as he grows but I wouldn't bet on it going away completely. My Buddha is very relaxed while handled and is always checking things out but he occasionally spooks himself and will flinch back his head as reflex and he only tolerates head petting if he doesn't see me coming. to help with 'getting use to it' i usually start from the tail and stroke his back as i move up to the neck. Seems to help him.