Answer:
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
I love spinach.
While you were folding a letter you got me. Usually you will do whatever it takes to avoid me but now you can't help but find me.
If you have me, you want to share me. Once you share me, you won't have me. What am I?
What is easy to get into but hard to get out of?
What never gets any wetter no matter how hard it rains?