Answer:
What is that over the head and under the hat?
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
Tall in the morning, short at noon, gone at night. But I'll be back soon.
What can you share and still have all for yourself?
Describes a mysterious region and a stylish pair of shorts.
I am your mother's brother's only brother in law. Who am I?