A Not So Subtle Joke
In another example of a secret joke within a scene from an episode of Dexter’s Laboratory called Nuclear Confusion. Dee Dee took Dexter’s nuclear core and left him clues for him to search for them.

Source: Twitter
One of the clues, and more accurately, the third clue, was at the Neighbor Lady’s house, and where exactly was this clue? It was right on the lady’s pants, and the message read “Dad’s Trophy.” Adults were indeed quick to catch the joke.