The 'Now That We're Men' meme is taken from the 2004 'The SpongeBob SquarePants Movie,' during the high-energy musical number where SpongeBob and Patrick believe they've magically grown mustaches (which are actually just pieces of seaweed). This scene represents a surge of unearned confidence and a hilariously distorted view of adulthood. In internet culture, the template is used to satirize moments where individuals feel suddenly mature or superior after completing a very basic task, like doing laundry or receiving a small paycheck. It serves as a nostalgic and relatable way to mock the 'fake it until you make it' mentality of growing up.