Answer:
Light hides me and darkness kills me. What am I?
My first is a heir; My second's a snare; my whole is the offspring of fancy; which I sent out of play upon Valentine's day As a token of love to my Nancy.
I am a nut with a hole. What am I?
In my yard there's a bed with no pillows a trunk with no clothes a branch with no leaves. What am I looking at?
My teeth help me suck.
No matter how little or how much you use me, you change me every month.