Answer:
I'm sometimes white and always wrong. I can break a heart and hurt the strong. I can build love or tear it down. I can make a smile or bring a frown.
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
You eat something you neither plant nor plow. It is the son of water, but if water touches it, it dies.
What did the piece of wood say when he saw the screwdriver and screws approaching?