Question of the day: Where does the Bible say "one man and one woman"?

The Sola Scriptura peeps puzzle me. I've spoken before about the fictional concept of "Bible alone", and yet am regularly re-surprised by the way in which it is touted as unarguably real. People claim that the only thing we should cling to is the word of scripture, and then turn around and state "truths" that are not found there.

For example, nowhere in the Bible does it actually say that marriage is to be between one man and one woman. We've all heard citations of scripture which support the stance, but that's a very different thing.

Because the Bible doesn't actually say it.

Anywhere.