Answer:
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
I have married many women but have never been married. What am I?
When you are inside me you will be encouraged to slam other cars.
No matter how little or how much you use me, you change me every month.
Six letters do my name compound; among the aged oft I'm found; The shepherd also by the brook hears me when Leaning on his crook; but in the middle me divide and take the half on either side each backward read a liquor tell ev'ry gay toper knows it well.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.