What does the Bible say about cohabitation?

Should Christians live together before they’re married? Is there really any place at all for testing the waters at that level of a relationship before saying "I Do" forever? Lastly, and most importantly, what does the Bible say about cohabitation and if it says we shouldn’t live together before our wedding day, what’s so bad about it anyway? Before digging into what God’s Word says, we discuss why so many live together before tying the knot and just how prevalent cohabitation is for people today.