IME, if you have a rooster so close to your face that he can run his beak through your hair this is a red flag~ if you haven't had a problem yet it is only a matter of time. That is just an accident waiting to happen...
Yeah...I know, there are all kinds of folks out there who let a rooster sit/stand on their heads, laps, shoulders, etc. and they have never have an incident(at least, we never
hear of the incident~who in the world is gonna admit that the big baby they were snuggling finally took out their left eyeball?)
Imagine how vulnerable you are to injury if you are bent over in your garden and a full grown roo is close enough to your face to comb your hair...in a flash he could flog you right in the face and though you've had no issues yet, a male animal is an unpredictable creature. Why take the chance and try to analyze his motives for grooming your hair? I'd nip this activity in the bud like you've been doing any other behaviors you have noticed to be borderline unacceptable. He has no business being that close to your personal space.
No matter how friendly, nice, sweet or cuddly a roo may be, I don't let creatures with a pair of 3 in. daggers and a bird's brain walk so closely to vital parts(eyeballs, for instance)...he can stroll around my legs all he wants, though mine rarely do.