 Multiple critics have noted that the portrayal of Doofenshmirtz and Perry 's relationship in the episode features a somewhat of a homosexual subtext . The concept behind it is a parody of stereotypical teen romance film , casting Perry and Doofenshmirtz — two males who are of different species — as the teenage couple who is " breaking up . " Perry 's initial suspicions over Doofenshmirtz having a new nemesis are portrayed as if a person discovers their significant other is cheating on them . Perry discovers a paw print on Doofenshmirtz 's face , resembling a lipstick mark on the cheek as if from a lover , and Peter the Panda emerges from Doofenshmirtz 's closet . Doofenshmirtz initially tries to deny having a new nemesis , but eventually admits to the accusation , noting that he " didn 't want [ Perry ] to find out this way , " overtly detailing a common way couples discover their partner is cheating on them . Perry is depressed about their " break up " and reminisces about their past " relationship " together , while music resembling a love song plays in the background . After feeling depressed himself , Doofenshmirtz " dumps " Peter and reunites with Perry on a talk show prone to featuring romantic confrontations . 
