Answer:
I am a word of letters three. Add two and fewer there will be. What word am I?
I'm sometimes white and always wrong. I can break a heart and hurt the strong. I can build love and tear it down. I can make a smile, but more often bring a frown. What am I?
I fly away as soon as you set me loose. People around you may slowly move away once they sense my presence.
I bring light to a dark world. In a current I travel and through tunnels I am hurled. Touch me and I'll kill you. What am I?
The dirtier I get, the whiter I am. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?