Betsey Brown Is director Peter Vack's sister. He convinced her to perform fully nude (for the first time in her career) and in graphic sex scenes, including pretending to lick a man's butthole while he licks hers. Their parents also appear in the film and watched those scenes at the premiere with a large audience.
Peter Vack said he originally wrote the sibling characters played by him and his real life sister Betsey Brown to be lovers. But as he was writing the graphic bathroom sex scene in the first act and imagined being totally naked with his sister having sex, he realized he hated that idea. So he set the script aside and came back to it later. At that point he dropped the incest idea and rewrote it.
Siblings Peter Vack and Betsey Brown both said they were disappointed when the film won SXSW's first-ever Adam Yauch Hornblower Award but it didn't help propel their careers. Brown also said she was pretty jealous of the attention her brother got at the festival while everyone ignored her. That inspired her to direct her first feature film Actors (2021).
Peter Vack said it was very difficult finding investors when his pitch was that the film was about two people who share an anal fetish and he wanted his own sister to play the lead.
When someone called the film a "shock comedy," Peter Vack said he'd never heard that term before. He thought he was just making a snobby arthouse movie.