Answer:
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
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.
I am always hungry, I must always be fed. The finger I lick will soon turn red.
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
When I'm born I fly. When I'm alive I lay. When I'm dead I run.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?