Answer:
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
What is often returned, but never borrowed?
You feel this sensation when you are dehydrated.
Women don't have and don't want it. Men get it but sometimes they try to get rid of it. What is it?
I occur twice in eternity. And I'm always within sight.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?