He looks just like his father and that is why his face is covered
That makes sense, seeing as we know how his dad's face looks, right? Also, his dad had a nice ponytail thing on his head? Why doesn't Kakashi have one of those too?
He have a serious case of Allergies!!! He uses the mask because of his condition!
If he start sneezing all over the place he would be a bad ninja!! So much for stealth!
"Chile is a thin and tall country"
Or he could have a hair lip or gold teeth he had put in when he was younger and now regrets them or even somthing extreme he had his tounge removed and a kunia put in it's place.
You can say I don't care BUT to say I don't care anymore is wrong I just don't care to care to give a rats ass about a damn thing.
we will never know...
Kakashi with the shop effect...
maybe he has a missing tooth
but i would like the mistery to remain a mistery