Answer:
What fastens two people yet touches only one?
Who has married hundreds but always been single?
What time is spelled the same forwards and backwards?
It goes up and down the stairs without moving.
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
Said to have fifty shades
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?