It made for more cohesive plots because now the same people who had sex in one scene could die in the next. Entertainment is not unique in its obsession with death. Elsewhere, too, death exerts a morbid allure. Cars slow down as they pass an accident. Even little children, sensing a death in the family, innocently but persistently question in order to probe what they sense to be a giant mystery.
Nobody hears of an aircraft accident without contemplating the passengers' terrible final moments.
Death involuntarily intrudes on most people's thoughts during a day. Nor is entertainment unique in its obsession with sex. No aspect of the Internet receives more attention than its concupiscent corners of cybersex. Children seem almost intuitively aware that asking questions about sex is nothing at all like asking what ever happened to Aunt Agatha's grand piano. Men ruin their lives for a few minutes of it and women glory in the power it confers upon them.