Contrary to his apparent belief, the hair on your head is like the hair on your chin: it doesn’t stop growing just because you shave it. So unless he is happy to have stubble on his head in an obvious male-pattern-baldness shape, he is going to have to shave his head at least once, possibly twice a day for the rest of his life, isn’t he.
Sudden-onset dyspraxia would have been welcome the other night. No doubt dear ickle Henwy would have laughed like a positive drane at Nearly- Headless Johnny.