What you get when you watch something cute:
Or at least get her opinion on the matter:
Think about it.
** Addendum: Yes, yes, I know. There are girls who truly enjoy watching sports.
If you want this:
Then tread carefully. When taken to inconsiderate extremes, sports, exactly like video games, will annoy the living daylights out of your wife, no matter how much she enjoys football. Therefore, my point still stands.
Watch them WITH her, not INSTEAD of her.