(CNN) -- A young man in his 20s -- let's call him George -- sits across from me in the exam room. "Dr. Youn," he says, "I have man boobs." I notice a not-so-unfamiliar smell wafting from his body. It's the same odor that floated my way during a rock concert I recently attended. "How long have you had a problem with this, George?" "Hard to say. But it seems to have gotten worse over the past year or so." "George, the first thing you need to do is stop smoking pot. Marijuana could be causing your man boobs."