Phineas' older sister Candace Flynn has two obsessions: exposing Phineas and Ferb's schemes and ideas, and winning the attention of a boy named Jeremy. Meanwhile, the boys' pet platypus Perry acts as a secret agent for an all-animal government organization called the O.W.C.A. ("Organization Without a Cool Acronym"), fighting Dr. Heinz Doofenshmirtz. Much of the series' humor relies on running gags used in almost every episode, with slight variation. Certain aspects of the show's humor are aimed at adults, including its frequent pop-culture references. Co-creator Dan Povenmire, who had previously worked on Family Guy, sought to create a less raunchy show that would make similar use of comic timing, metahumor, humorous blank stares, wordplay and breaking the fourth wall. Povenmire describes the show as a combination of Family Guy and SpongeBob SquarePants. Co-creator Jeff "Swampy" Marsh has said that the show was not created exclusively for children; he simply did not exclude them as an audience. Episodes ==Characters== The series' main characters live in a blended family, a premise that the creators considered underused in children's programming and that reflected Marsh's own upbringing. Marsh considers explaining the family background "not important to the kids' lives. They are a great blended family and that's all we need to know." The choice of a platypus as the boys' pet was similarly inspired by media underuse, as well as to exploit the animal's striking appearance. Povenmire and Marsh wanted to select an uncommon species, an animal that kids could not "pick out at a pet store and beg [their parents] for." The platypus also gives them freedom to "make stuff up" since "no one knows very much about them." Choosing a platypus also allowed them to own that "mental real estate," so that if someone thinks of the word "platypus," they will associate it with Agent P, just as an ogre is now commonly associated with Shrek. Marsh called the characters "cool, edgy and clever without ... being mean-spirited." Animation director Rob Hughes is said to have noted that "in all the other shows every character is either stupid or a jerk, but there are no stupid characters or jerks in this one." Music The series is known for its original songs that appear in almost every episode since the first-season "Flop Starz". Disney's executives particularly enjoyed the episode's song "Gitchee, Gitchee Goo" and requested that a song appear in each subsequent episode.