"Following this logic men should have wives and slaves."

The Bible never condones polygamy or slavery.  It mitigated the damage caused by these long established institutions, and the principles in both the OT and the NT, should have eliminated both long before Jesus arrived.  But most of us are dull and stupid when it comes to spiritual things.  Seems like centuries of slavery and Lev. 19:18 should have made the Israelites abhor the practice, but it obviously didn't.  That is neither the fault of God or His Word.  Jesus repeated Lev. 19:8 to His followers, but they didn't get it until centuries later.  So, just because some seminary professors with letters after their names take a position, doesn't mean its right.  It was the "educated" elite at the time of Christ who were His biggest detractors, claiming that He could not be the Messiah.  "Christians" from the North and the South both thought their positions on slavery were right during the Civil War.  They couldn't both be right.