Answer:
I always run but never walk often murmur but never talk have a bed but never sleep has a mouth but never eat.
What bone has a sense of humor?
You turn me over after you have traveled far. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
I flow from the Homerβs mouth when he sees doughnuts.