Answer:
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find.
My first master has four legs, my second master has two. My first I serve in life, my second I serve in death. Tough I am, yet soft beside. Against ladies cheeks I often reside.
What can be swallowed, but can swallow you?
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
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.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.