Sex in film pursuing. In horror films, sex is often used to "mark" characters that are doomed to die. Characters that engage in sex acts are often the first to be claimed by the antagonist(s), or will die shortly after their sex scene or (sometimes) in the middle of it. This convention of it being bad luck to have sex in a horror film is notably illustrated in the "Friday the 13th" film series, where supernatural villain Jason Voorhees takes a special dislike to teenagers and young adults having sex because, as a young boy, he drowned in a lake while the camp
Friday the 13th: The Series the last episode was to unite the movie and television franchises by having the final item recovered (see "Premise" above) be the hockey mask belonging to Jason Voorhees. This remains unfounded and while there was talk about having a hockey mask on one of the sets as an in-joke, there was never any serious intention to mix the film series into the television series. The series, about a group of individuals rooting out evil supernatural occurrences, created a mold which many later series fit into. "Buffy the Vampire Slayer", "Angel (1999 TV series)", and "The X-Files" all have many episodes