This past weekend, millions of Americans turned out to watch Fifty Shades of Grey, a movie that is more or less one 125-minute excuse for a series of escalating sex scenes. The movie’s release is also the perfect occasion to pause and honor the art of the sex scene: So many movies attempt them, but very few ensembles are able to writhe and moan their way to something truly memorable.

To celebrate this art form, we’ve made this quiz. For each moan, can you pick the movie it appeared in? (We strongly suggest headphones.)