The Doctor himself, Marcelo Zelicovich, used to work in Buenos Aires scenting public restrooms. He serviced many clients, making sure their restrooms smelled like anything but what they were. One of his clients, desperately called him asking for help—his bathroom smelled fine but his store smelled like a bathroom. Although not Marcelo’s expertise, he went over to help. Looking for the source, it occurred to Marcelo that it was coming from the air conditioning. He found that the vent on the roof directly faced the smelliest creek in all of Buenos Aires, and the afternoon breeze was giving them all a taste.