Answer:
You can catch me but cannot throw me. What am I?
I can be swallowed, but I can also swallow you. What am I?
The Titanic is still here.
I belong to everyone. Sometimes make you happy sometimes make you sad. I will never end until the day you do.
You throw me away, I find my way back. Traditionally, I'm wooden with an arch in my back. What am I?
No matter how little or how much you use me, you change me every month.