A Giants Fan

A first grade teacher in Dallas explained to her class one day that she was a huge Cowboys fan, and asked her students to raise their hands high in the air if they were Cowboy fans, too. Every single hand went up in the air excitedly except for one little girl sitting way in the back, who did not go along with the crowd. The teacher asked her why she had decided to be different.
"Because I'm not a Cowboys fan," she responded.
"Then," asked the teacher carefully, "what are you?"
"I'm a proud New York Giants fan," the little girl said.
The teacher next asked patiently, "Did your family once live in New York?"
"No," said the little girl, "I'm just a proud Giants fan."
"Do you have friends or relatives living in New York? Is that why you're a Giants fan?" asked the teacher, trying to understand and remain calm.
"Nope," responded the little girl shyly, "I'm just a proud Giants fan."
Somewhat exasperated, the teacher asked the little girl, "If you've never lived there, and don't know anyone who lives there, then how can you be a Giants fan?"
"Well, my Daddy is a Giants fan and my Mommy is a Giants fan, so I'm a Giants fan, too," she responded, smiling.
"That's not a very good reason," the teacher responded quickly. "What if your mommy was a moron, and your daddy was an idiot? What would you be then?"
The little girl thought for a moment, smiled and said, "Then I'd be a Cowboys fan, just like you."