Answer:
My first is in riddle but not in little. My second is in think but not in brink. My third is in thyme but not in time. My fourth is in mother but not in brother. My last is in time but no t in climb.
What bone has a sense of humor?
I only exist when you are here. Where you never were I can never be.
What is the saddest fruit?
I am easy to see but no one likes looking at me. Without me there would be no you. I can make you complain or make you happy. But you almost always take me for-granted.
I flow from the Homerβs mouth when he sees doughnuts.