Answer:
Though I am only two words I have thousands of letters in me
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead.
The more of me you take, the more I appear behind you. What am I?
What do you call a bear with no teeth?
The more it dries, the wetter it becomes. What is it?
No matter how little or how much you use me, you change me every month.