Sure there is, as you've just demonstrated. Compulsory sterilization is one of many ways to implement eugenics, and the fact that it is so closely associated with the general concept is the cultural meme TeMPOraL was referring to. Other more benign forms of eugenics like incest taboo or selecting your sexual partners are not just acceptable, they are often not even seen as eugenics, because eugenics is "that bad thing the Nazis did".