Of course... [Robert continues cleaning the feathers as though he were saying nothing of any consequence.] It is... not frequent for head hair to experience abnormalities, but neither is it impossible.

For instance... a hair can be ingrown, which sometimes results in folliculitis or similar infectious conditions, and often... requires removal of the hair. This is... more common for those whose hair curls, and androgenic hair is... more frequently a victim to such condition, but in practise it occurs... with any hair follicle, provided it grows strangely...

[Has this just never been a problem in Don's life?]