Answer:
I help engines spin and pants stay up
I can run but not walk. Wherever I go, thought follows close behind. What am I?
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
I can fall off a building and live but in water I will die.
I crushed on Wendy Darling.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.