Answer:
I am three simple words everyone wants to hear. Three simple words such simple words and yet...life changing...
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
I am a word. I become longer when the third letter is removed.
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
I'm very tempting, so it's said. I have a shiny coat of red and my flesh is white beneath. What am I?
The warmer I am the fresher I am.