Flower or Flour

While attending a marriage seminar on communication, Wally and his wife Carolyn, listened to the instructor declare, "It is essential that husbands and wives know the things that are important to each other."
He addressed the men, "Can you describe your wife's favorite flower"?
Wally leaned over, touched Carolyn's arm gently and whispered, "Pillsbury All-Purpose, isn't it"?