blech
Explanation
The Joke
A patient sitting on an exam table in a medical office asks the doctor, "How did it go, doc?" The doctor, holding a clipboard, responds with "Well, for starters... EW!" The caption beneath the comic reads: "I need a new proctologist."
The joke is that the patient has just undergone a proctological examination (a rectal exam), and instead of providing a professional medical assessment, the doctor responds with disgust. The word "Ew" is something you might expect from a squeamish friend, not a medical professional who has presumably performed this procedure many times before.
The Humor
The humor lies in the violation of professional expectations. A proctologist is a doctor who specializes in conditions of the rectum and colon -- this is literally their chosen medical specialty. The idea that a proctologist would react with "Ew!" to doing their own job is inherently funny because it suggests either something truly alarming about this particular patient, or that the doctor is hilariously unsuited to their profession. The patient"s deadpan caption -- "I need a new proctologist" -- serves as the perfect dry punchline, acknowledging the obvious: you probably want a doctor who does not find your anatomy disgusting.