Answer:
A mechanism to discover who is following you.
Most people need it, some ask for it, some give it, but almost nobody takes it. What is it?
I go around in circles, But always straight ahead Never complain, No matter where I am led.
What is all over a house?
What gives life and love, and is there till they die? What can hide you and find you, heal you and feed you but should never give up on you?
What did the piece of wood say when he saw the screwdriver and screws approaching?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?