Explanation From user " Mameiha "
Just how many readers realized that the kid was an extreme masochist who would antagonize his father into beating him. His father likely beat him long before he became a masochist though and the father is also the very reason the kid became a masochist. If the only attention he received from his father was when he was being beaten, he would begin to find pleasure in the attention and eventually pleasure in the pain. The kid miscalculated when he antagonized the father too far and was stabbed. As for the vampire, he recognizes the masochistic tendencies in the kid, which is why the kid tries repeatedly to kill him. The kid knows it is impossible to kill the vampire, but he still antagonizes the vampire's wrath in order to gain the vampire's attention and the punishment he desires so much. The kid was programmed to be this way by the actions of his father from a young age. I doubt the kid really feels angry at the loss of his father, since the vampire took over the punishment and seemed to do a much better job at it. But it does make for a good excuse to antagonize the vampire.
In BDSM the kid would be considered a "brat" or a defiant masochist. This is someone who will incite and antagonize their sadist in order to receive punishment. The punishment is what the defiant masochist desires greatly. The more they fight back and antagonize, the harsher the punishment and this is precisely what the defiant masochist wants.
Game (Dodam)