Hill's story is actually a beautiful romance disguised as a horror-comedy. If you let it, Horns will grab hold of you. If the fact that the film stars Harry Potter isn't enough for you (it was enough for me), then see it because it's a good story that is not only dark and ominous but also has some hilarity mixed in.

noun. one of the bony, permanent, hollow paired growths, often curved and pointed, that project from the upper part of the head of certain hooved mammals, as cattle, sheep, goats, or antelopes.

Animals have a variety of uses for horns and antlers, including defending themselves from predators and fighting members of their own species (horn fighting) for territory, dominance or mating priority. Horns are usually present only in males but in some species, females too may possess horns.

Ig meets Lee by the docks and pulls off Merrin's necklace. He realizes Lee was unable to see the horns because he was wearing the necklace. Exposed to the horns, Lee falls under their influence and admits to killing Merrin.