10 Best Horror Movies To Watch On Valentine's Day

10. Sightseers

Directed by Ben Wheatley, Sightseers follows a doting couple, Tina and Chris, who bond through their eccentric interests and disconnection from the rest of the world. Based on their playful conversations, gooey-eyed stares, and rampant sex, it's obvious the two adore each other.

But there's another reason why Tina and Chris are so close - they're both killers. While the socially awkward duo embark on a caravan holiday across the English countryside, they attack and slaughter nearly everybody they encounter, either due to delusional paranoia or on a whim. There are times when they come across as a regular couple, making it more horrifying when they nonchalantly commit a hit-and-run or toss a passerby off a cliff.

There are unmistakable moments of growth and warmth between Tina and Chris, so their massacre doesn't always come across as mindless bloodshed. In a sick way, they feel closer while conducting murders. Other times, they suppress their killer instinct, hoping to find a different way to make each other happy.

Sure, the relationship is immoral, but there's never a point where it feels insincere.