Dear De'kra,
It's very difficult to explain. At least with humans (and elves and dwarves and most animal species), everyone has two parents, a mother (the female) and a father (the male). Now, they might not always have two parents to take care of them, but there are always two parents to begin with. This also has to do with the difference between males and females.
Obviously, it was different for you when you were a child (please tell me you know what a child is). As they say, 'it takes a village to raise a child', and apparently, a village raised you. That could explain why you have much better morals than most people in Eubric - you were raised well.
I suppose the 'plague' could be rendered void if the difference vanished, but then there would be no more humans. The difference and the 'Love Plague' both exist so that there will be more humans. We'll speak more on this when you get back to the Hall, okay?
Your Friend,
Tomas