What's in a Name?

Native American boy goes to his mother one day with a puzzled look on his face.

"Say, Mom, why is my big brother named Mighty Storm?"

"Because he was conceived during a mighty storm," she replied.

"Why is my sister's name Cornflower?" he asked.

"Well, your father and I were in a corn field when we made her," the mother replied.

"And why is my other sister named Moonchild?" he asked.

"We were watching the moonlanding while she was conceived," she replied. "Tell me, Torn Rubber, why are you so curious?"