I'm nostalgic. I miss childhood. I miss first grade. I miss thinking girls are gross. Do you know how much money I could save if I still thought girls were gross?

The speaker uses exaggerated nostalgia to contrast the simplicity of childhood with the costly complications of adult desire and relationships. “First grade” stands for a time when social and sexual interest was absent or actively repelled (“girls are gross”), a comic shorthand for innocence and emotional insulation. The punchline—how much money he could save—turns longing into self-mockery, implying that adulthood brings not only attraction but also spending driven by dating, impressing partners, or pursuing romance. Beneath the joke is a wry observation about how maturation replaces uncomplicated certainties with appetites that can be expensive, distracting, and hard to manage.