The Purity Ball that Eddie (Joel Murray) attends with Karen (Laura Wiggins) is not actually practiced in the Christian faith. Though it may be encouraged in some sects, it is not at all referenced or encouraged in the Bible to openly confess past sins in front of a group of people to be made pure. The Bible says that sins are "not to be remembered in the sea of forgetfulness" (meaning that once your sins are confessed to Jesus, He chooses to forget them and let you start anew).