You think it'd be impossible to share your house with your wife, your daughter, and fifty million or so Argentine ants. And you would be correct.
Do you know, or are you guessing? Do you know, or are you guessing? You're guessing, aren't you? No points! 0! You don't get any points for guessing!
There is so much you can't know about your spouse when you get married, like that one day she will want to eat her placenta.
If you saw two guys named Hambone and Flippy, which one would you think liked dolphins the most? I'd say Flippy, wouldn't you? You'd be wrong, though. It's Hambone.