Does The White iPhone 5 Need A Case?

I Have A Black iPhone 5, And I KNOW It Needs A Case Because The Black Part Scratches Off The Aluminum, What About The White? Does It Need One?

They are made of the same material so yes

Yes, it needs a case because it can get scratched and the back can also get scratched. Also to make sure the screen doesn't get cracked. My friend had an iphone 4s and it fell out of her pocket, and the whole back and front of her iphone shattered.