Sodom's Cat (2016)

Sodom's Cat, from Taiwanese director Huang Ting-Chun, asks what it must be like to be a part of this world, and yet feel strangely distant from it. Sun is a young man who attends a sex party, organized via a dating app, with four other men. While the others seem to be enjoying themselves enormously, Sun finds himself unaroused, despite the others' best efforts turn him on.