The Qur'an allows for the owning of sex slaves:

If you fear that you will not act justly towards the orphans, marry such women as seem good to you, two, three, four; but if you fear you will not be equitable, then only one, or what your right hands own; so it is likelier you will not be partial. (Qur'an 4:3)

This verse is the basis for Islamic polygamy, allowing a man to take as many as four wives, as long as he believes he is able to “deal justly” with all of them. But justice in these circumstances is in the eye of the beholder. Ibn Kathir says this the requirement to deal justly with one’s wives is no big deal, since treating them justly isn’t the same as treating them equally: “it is not obligatory to treat them equally, rather it is recommended. So if one does so, that is good, and if not, there is no harm on him.”

The verse goes on to say... http://www.jihadwatch.org/2013/05/bangladesh-140-christian-girls-rescued...