My family is very addictive. My father used to laugh about his great-uncles being decanted out of gutters most days. He told us he wasn't an alcoholic, but he was. He could barely survive a day without. He would be OK if he knew when his next "fix" would be. Three of his seven siblings were alcoholics, and many of my cousins on his side are also addicts of various sorts. with that history, I am very wary of all stuff like that - I managed to get off nicotine and coffee, never drank much [I am a really cheap drunk], and never, ever taken any drugs of any sort.
So yes, addictions are real - to nicotine, alcohol, drugs, caffeine...
But I think that cheese and flapjacks are more a habit. If they are there, you really enjoy them; but you don't crave them like a cigarette or that first cup of coffee. I drink de-caff incidentally.