I voted depression, but yeah temptation is a factor as well. Although one area where I have managed to restrict myself is chocolate (usually only once a week)... if I could do that with other sweet things that would be great!
That would explain why I occasionally get a sensitive feeling in the Achilles tendon of my fight foot which makes me a limp a little (and I do have a few pains in my right side... although it could be a spinal thing?)