Actualy I have a question. If Bal is the king of [censored] then how come all the women had to sleep with him? Not exactly the {censored} of virgin maidens like the first vampire. And Serana's mother wasn't even a virgin.
The truth is Molag Bal can do whatever he pleases. The [censored] doesn't "do" anything, it's basically just a gift that Malog Bal wants and in return he gives them vampirism.
Correct me if I'm wrong but the first vampires were created despite Arkay (the god of life and death).
There are questions surrounding how Arkay began HIs godhood. Some say he was born of Akatosh Or Lorkhan. Some say he was a Demi god between Akatosh and a mortal woman. if memory serves me right they believed the mortal woman to be a virgin that conceived a god.
But there was a book in Daggerfall titled something like "The gods were once like us" that said Arkay was once a shopkeeper that found a special book on the cycle of life and death written in no known language. He became enthralled in it so much that he neglected everything else. He was then hit by the plague and on his death bed prayed to Mara who then accepted him as a god.
Sorry got sidetracked. Basically the first vamps were just to spit in the face of Arkay.