Because

"Don't pick flowers"
My mother said.
"Look right and left"
My mother said.
"Say please, and thank you"
My mother said.
"Wash your hands"
My mother said. 

But when I asked 
Why do people die?
And why do people live? 
How come we dream at night?
And why do people fight?

She only said:
"Because."
She said: "Because."

And I'm still asking.