*incarceration*The case for why Slaves and slave girls are in the quran.
Imagine this is back then and im forced to engage in a defensive war(the only kind permitted in islam) and be far away from my wife, who else would i go unto, my mates? I would reluctantly take enemy's women because it was they who inconvenienced me. And as for male war captives, there was no mass incarnations, so each captive became the responsibility of their capturers.