[tbw2]

That was one of the side benefits of conquest - sex slaves = new blood.
It is probably also what kept many royal families on top - foreign brides decreasing the inbreeding depression in the clan.

[PIF]

During the heyday of the Islamic expansion: 628-728AD, the most lucrative business for non-Musselmen to be in was the slave trade, the demand for women to fill harems was so huge. In fact, non-Musselmen virtually cornered the market - the great Western historical shame no one talks about.

As for today's Musselmen, they are following the highest Islamic male calling - emulating the life of Mohammad in all things: jihad, war, Jew killing, mass murder, beheadings, slaving, and, if they are fortunate before going off to their great reward of white raisins in the vastly over crowded Paradise, marrying their cousin - first or otherwise ...