Agreed, I did not intend it to come off as a genetic thing. Two people have now made it clear it comes off that way, I’ll edit for clarity.

It’s also possible he doesn’t abuse them and grow up to be like him because “dad wasn’t half bad, he took care of us and tried despite being a hard as” or some shit like that.

Overall, the point was more wishing harm upon him and hoping the harm already done was more extensive. Chuds like this place a great deal of value in virility and lineage, therefore losing the ability to procreate is fitting as a karmic injury.