Answer:
I am three simple words everyone wants to hear. Three simple words such simple words and yet...life changing...
I am used when you jump off a bridge for fun.
I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?
This guy crossed a road and everyone wants an explanation.
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
The answer I give is yes, but what I mean is no. What was the question?