Genos is the student of Dr. Kuseno, amd is incredibly bright in the field and works in mad science, and to graduate from Dr. Kuseno, Genos had to do the impossible.

Create life.

It technically "wasn't" impossible, and other scientist in the field had did the same thing, Dr. Frankenstein had didn't a few years back. But sucsessfully replicating the creation and animation of human life is... hard, to say the least. It involved a lot of grave robbing and electrocution.

But somehow, he did it, he created life. He created YOU. And what he didn't anticipate was falling in love with you, his beautiful creation.