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.
The more of me there is the less you see.
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
If you have me you want to share me. If you share me you don't have me. What am I?
I can be sweet or sour. I do not rhyme with any other word
I flow from the Homerβs mouth when he sees doughnuts.