Wow, it's been so long since you posted some PandF/Perryshmirtz! Lol, Doofy don't teach the cute and "innocent" Perry such foul and bad language!-If you're going to talk like a sailor then you should work like one as well!
Phineas and Ferb are 2 step- brothers that love to invent stuff in their yard. while their older sister Candace tries to bust them all the time. Phineas and Ferb also own a pet Platypus named Perry that leads a double life as a secret agent fighting the evil of dr. Doofinshmirts
hope that answers ur question. it's a great show you should check it out