We have come to the most important topic. Love is considered to be only an enticement for the propagation of the human race. It and an instrument for the creation of high-quality offspring.
The idea is very simple: a couple of people must have three harmonious biorhythms in order to give their children all the positive qualities, the best possible abilities. The moment of conception must happen in the period of three maximums. Each of biorhythms has its own sphere of influence: the intellectual one, on intellect; the emotional one, on beauty; and the physical one, on health and physical beauty.
So, we can say that the question of how to control heredity is answered. The only thing, which remains, is to put it into practice.