Answer:
I let water fall on you while everyone else stays dry. What am I?
You can see me in water, but I never get wet. What am I?
I am the kind of soda you must not drink.
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.