Red Indian Names

A Red Indian boy goes to his mother one day with a puzzled look on his face. "Say Mom, why is my bigger brother named Mighty Storm"?
"Because he was conceived during a mighty storm", she said.
Then he asked "Why is my sister named Cornflower"?
"Well your father and I were in a cornfield when we made her", she replied.
He then asked "And why is my other sister called Moonchild"?
"We were watching the moon-landing when she was conceived", the mother replies.
The mother paused and said to her son... "Tell me, Torn Rubber, why are you so curious?"