"Are you mental? Voldemort was all about blood purity, in fact, he was about to mandate Purebloods to marry and breed like cattle by passing some sort of Pureblood Restoration Act. The Aurors were going to be tasked with enforcement. Imagine if he - or you - were forced to marry Millicent Bulstrode and had to", he shuddered at the thought, "do it every week till she's pregnant and have one child every year!"