The popular phrase, "I have nipples, Greg, could you milk me?" from the 2000 movie "Meet the Parents", is similar to the widely held belief that tomatoes, because of their seeds, are really fruits instead of vegetables.
Botanically, tomatoes are fruits but cucumbers, zucchini, pumpkins, nuts, corn, peppers, peas, and other vegetation that may not seem like it also fit into this fruity category.
Botanists define fruit as any part of a plant that contains both its seed and the ovary that produce that seed. However, of all the botanically fruity plant pieces we commonly call 'vegetables', tomatoes are one food with an especially controversial history of classification.