Whenever you see a Slutty Girl and a Redneck having sex in the woods where a Scary Monster is lurking, you know something bad is about to happen. Add a Naughty Santa's Helper outfit, and you've got Maximum Wrongness. NSFW?
This scene, from Search For The Beast, is just disturbing on so many levels. Let's start with the obvious "slutty girl doesn't notice that a monster has killed her boyfriend in the middle of sex" joke. And then the fact that during the "scary" part, when the monster has taken over from the boyfriend, the girl can't stop giggling at the silliness of it all. (I think the video gets cut off early, but when the scene fades to black, you hear more porno ecstatic moans dubbed in for no reason.)