Answer:
Describes a mysterious region and a stylish pair of shorts.
What two things can always see what the other sees, but can never see each other?
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
We are five little objects of an everyday sort, You will find us all in a tennis court.
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
Before Google, we actually had to physically look things up in this building full of knowledge.