What Am I Riddles

Question: What fastens two people yet touches only one?

Question: Of the king I am blue and of the peasant I am red.Of the frog I am cold and of the dog I am hot instead.What am I?

Question: I'm many people's favorite place,
even though many don't remember their stay.
You'll love to come but hate to leave,
if you get cold use my sleeves.

What am I?

Question: What gets longer when pulled,fits between breasts, slides neatly into a hole,has choked people when used improperly,and works best when jerked?

Question: I have all of your knowledge but could fit in your hands.

What am I?