The sound of someone scratching their head has always irritated me. When I had cats, them scratching themselves or the litter box irritated me too. But you, when you scratch your head pointlessly, then when you scratch it in a vulgar manner and rapidly, do you know how much hair, scalp and skin particles you're releasing into my space? Or after you wash your hair and it's drying out, but you still must feather it out to dry it. It mskes me need to want to take a shower. And vomit knowing all the dead skin floating around.