Answer:
My first is a body of water. My second is me. My third came before. My fourth before all three. My fifth sounds like my first. My sixth is in a lake. Put all six together to make an animal that will keep you awake.
Don't do this in the shallow end.
My thunder comes before the lightning. My lightning comes before the clouds. My rain dries all the land it touches.
He has one and a person has two. A citizen has three. And a human being has four. A personality has five. And an inhabitant of earth has six.
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.