class haircontrols:
    def isithair( self, item ):
        badnames = ("eye", "tongue", "teeth", "hat", "mask", "veil" )
        return True if not any(badname in item.InternalName().casefold() for badname in badnames) else False

you can expand the badnames to include anything else that you find in other 
objects that you would not normally find in a hair object.
This is untested but it should work, perhaps with a little 
modification.

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