Nima (Alia Shawkat) and Sergio (Laia Costa) find themselves in a weird relationship of sorts in "Duck Butter." After a brief hookup, Sergio tells Nima that she thinks it'd be interesting to see what would happen if you spent a solid 24 hours with a partner to get to know them better and quickly — having sex through all of it. The two end up doing just that, and it's as sexy, awkward, and strange as you'd imagine. While Sergio's idea may have sounded good in Nima's head, in practice, it isn't at all what she thought it would be.