Answer:
Sometimes I am white, sometimes I am dark. Most people love me. What am I?
While you were folding a letter you got me. Usually you will do whatever it takes to avoid me but now you can't help but find me.
I am always around you but often forgotten. I am pure and clean most time but occasionally rotten.
No legs have I to dance, no lungs have I to breathe. No life have I to live or die, and yet I do all three. What am I?
I am the kind of ant that's good at math.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?