This song captures the essence of immaturity, exploring the feeling of an adult who still acts like a teenager. Though the songwriter didn't consider it strictly autobiographical, he admitted to spending his twenties behaving immaturely. Originally titled "Peter Pan Complex," the song's name was changed to be more widely understood. It's a pop-punk tune known for its distinctive, arpeggiated guitar intro, and it perfectly embodies the band's blend of catchy melodies and punk energy, often focusing on themes of adolescent frustration and the lack of maturity. Playing it feels like a playful nod to never truly growing up.