Thank goodness someone else here actually studied a bit of film. This is completely right - it's become a silly trope now, but with the original horror films (the ones all the stupid re-makes are based off of) sex was actually a device used to provide some level of moral justification for the people being killed. There's a reason the "slutty cheerleader" is always one of the first ones killed (often in the most gruesome way), whereas the virginal and nice "girl next door" is one of the survivors.Gralian said:Sex isn't just in there to pander to the main demographic of slasher films, it's actually a cinematic device. Generally, sex is considered a 'sin'; this means that if people have sex in a horror, particularly a slasher, they are going to die. There is an actual reason for this; i think it was Hollywood's way of being critical of the very things it was trying to portray, such as debauchery and amorality in horror flicks. especially in the Golden Age of Hollywood, where everything was censored with extreme prejudice. When i was doing my A-levels at school, i actually examined this in great detail in Film Studies, but i damn well forgot most of it now. Seriously though, any characters who are appear sexy, lewd or have sex are always going to be 'punished' by the big bad. This is sometimes averted if the person is about to have sex, but then they don't go through with it either by choice or no.
Heck, even looking back at the original Friday the 13th, Jason originally kills his sister when she brings a boy home and they start making out (although it's implied they're going to go further than that). He's literally a child at that point but it's only when his sister does the "immoral" thing that she winds up being killed. Afterwards we also find out about his broken family life, etc. - all of which provide further reinforcement of the old-fashioned values that used to be prevalent among adults of the time.
But again, those were the originals. Nowadays with our changed cultural values those same devices have become tropes that are outdated and ridiculous. It's too bad the genre hasn't really changed or caught up. But then again I'm not really a horror fan anyways - mostly because it's not horror, just slasher gore. And that's fine if it's something you enjoy, but it's never really been my thing.