Answer:
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 belong to everyone. Sometimes make you happy, sometimes make you sad. I will never end until the day you do. What am I?
What is light as a feather but even the strongest man cannot hold it for more than a few minutes?
I let water fall on you while everyone else stays dry. What am I?
I can never be stolen from you. I am owned by everyone. Some have more some have less.
A doctor might remove one from the neck of a Dracula victim.