Category: Things That Horror Movies Think Ought to Scare You

Women having tentacular sex:

Possession (1981; dir. Andrzej Żuławski)

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The Guardian (1990; dir. William Friedkin)

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La región salvaje (2017; dir. Amat Escalante)

Old media acting like new media:

Arrebato (1979)

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Videodrome (1983)

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Ringu (1998)

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Sinister (2012)