user
Given a cartoon image and a caption. Caption: What we have here is a reptile dysfuntion. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A play on the term "erectile dysfunction," which is a medical diagnosis that people sometimes receive. In addition to being a simple pun that addresses the snake around the man, there's a slight crudeness to the joke because snakes look somewhat phallic.