BECAUSE I CAAAAN
(more or less Spoiler alert ... )
I'm sorry :'D ...
Original picture/scene is found in the episode "The Klimpaloon Ultimatum"
I just changed Phineas and Isabella to Doof and Perry because I found that most people kinda overreacted because of the Phinbella scene XD
Dr. Doofenshmirtz and Perry the Platypus belong to Dan Povenmire and Jeff "Swampy" Marsh