Answer:
What can you catch but not throw?
I am a type of cheese made backwards
My teeth are sharp my back is straight to cut things up it is my fate.
My first is in some but not in all. My second is in tiny but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing rugs used every day.
The more you look at me The less you see.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?