Released in 2005, 'The 40-Year-Old Virgin' features an iconic improvised banter scene between David (Paul Rudd) and Cal (Seth Rogen). While playing video games, the two characters engage in a rapid-fire exchange of insults starting with the phrase 'You know how I know you're gay?'. The dialogue escalates into absurd territory, with Rudd and Rogen listing increasingly specific and nonsensical reasons like liking Coldplay or liking the movie 'Maid in Manhattan'. In modern meme culture, this clip is the gold standard for roasting friends or pointing out 'self-reports' regarding specific subcultures. It represents playful gatekeeping, friendly ribbing, and the hilarious discovery of a friend's niche or embarrassing habits. Example captions include: 'You know how I know you use Arch Linux?' or 'You know how I know you're a Disney Adult?' or 'You know how I know you still use light mode?'