When you're doing something important - like talking with your significant other, or figuring out your pyche with your therapist - do you ever start thinking about food? This isn't unusual, and isn't necessarily sociopathic.
And I think you know my next question: What flavor?
Research gathered from an iPhone app concludes that people's minds wander almost 47 percent of their waking hours. That's not news to some of us. And we think food is a good place for it to wander to.
You might also enjoy a therapy cartoon about a different kind of obsession.