In Douglas Adams' "So Long, and Thanks for All the Fish," a character grapples with his perceptions of grown men and their behavior. Despite the historical evidence suggesting otherwise, he convinces himself that adults should act in a more mature and rational manner. This internal conflict highlights the often unrealistic expectations society places on individuals as they age.

The character's struggle becomes a reflection of broader themes in the novel, questioning the nature of adulthood and the authenticity of human behavior. Adams uses this moment to explore the contrast between perceived maturity and actual conduct, suggesting that the complexities of life often lead to unpredictable and irrational actions, even among those we expect to know better.