Katrine, Petra, and "Cornfed" are a trio of buxom young women who appeared in the Duckman episode "Papa Oom M.O.W. M.O.W."

They arrive at Duckman’s detective agency where Duckman greets them with "I look at breasts. And I’m a detective. But mostly the breasts thing." The third woman is so ditzy that she mistakenly says her name is Cornfed, forgetting her own name which is never revealed.

Later, Duckman touches their butts and inadvertently saves the President's life in the process, which leads him to be commended as a hero. On a Geraldo Rivera parody talk show, Duckman's true actions are exposed, ending his stint as a supposed hero.

Two women with very similar designs appear in the background of the episode "A Room with a Bellevue."