Answer:
I stink up your breath and fights evil vampires
When it comes to me, you go on red and stop on green. What am I?
I am carried by mad animals.
You bind me and I walk. You loosen me and I stop. What am I?
If you have it, you donβt share it. If you share it, you donβt have it. What is it?
No matter how little or how much you use me, you change me every month.