Answer:
No matter how little or how much you use me, you change me every month.
What has a ring but no finger?
I shave several times a day, yet I still have a beard. What am I?
I had a bright start, but I couldn't take the pressure. I consume everything, yet I don't eat anything. What am I?
I have a brother. However much we run we do not reach each other.
I flow from the Homerβs mouth when he sees doughnuts.