Wikipedia
Rassenschande (literally "racial shame", "racial defilement", or "racial pollution", legally " miscegenation"), or Blutschande ("blood defilement"), was a concept in Nazi German ideology pertaining to sexual relations between Aryans and non-Aryans, enforced by the Nuremberg Laws which were adopted unanimously by the Reichstag on 15 September 1935 (see also: the German " Aryan certificate" requirement). Initially, these laws referred predominantly to relations between Germans and non-Aryans. In the early stages the culprits were targeted informally, and then later on punished systematically by a repressive legal apparatus.
In the course of the ensuing war years, relations between Reichsdeutsche Germans and millions of foreign Ostarbeiters brought to Germany by force, were also legally forbidden. Concerted efforts were made to foment popular distaste for it. The reasons for this were purely practical, because the Eastern European female slave labour servicing the German war economy soon became targets of rampant sexual abuse at the hands of the German farm workers and overseers. The Polish and Soviet women and girls began giving so many unwanted births on the farms that hundreds of special homes known as Ausländerkinder-Pflegestätte had to be created, in order to exterminate the infants out of sight.