Answer:
There is someone, and there is always another, for without the other, there wouldn't be one
All about the house, with his lady he dances, yet he always works, and never romances.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
Held firmly in the hands, like a sword it cuts deep. Bloodless strokes, all, then forward we leap.
Slayer of regrets, old and new, sought by many, found by few.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?