Answer:
What has six faces and twenty-one eyes?
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
When the day after tomorrow is yesterday. Today will be as far from Wednesday. As today was from Wednesday. When the day before yesterday was tomorrow. What is the day after this day?
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
Salty water everywhere but not sea in sight.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?