Answer:
I am rarely touched but often held and if you are smart you'll use me well.
I am in the past, never in the future. I don't exist, but have existed. I saw what you saw, and this is what I will ever see. What am I?
I help engines spin and pants stay up
I am an odd number. Take away one letter and I become even. What number am I?
I have fangs and enjoy piecing holes with a single bite.
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?