User blog comment:B214/Question and Answers/@comment-95.234.167.146-20130503181203/@comment-16281343-20130823084205

Just like what I said, the value their rankings more than having childrens especially the strict pure-blooded ones.

If they don't have suitable partners that will be benificial for their family then their is no point for marrying and having children.

And since the creation of the Evil Pieces, population of the devils is not a problem since they can increase by reincarnating other beings, so the ardous process of having a child is being neglected by the devils.