I found several online articles discussing sugar withdrawal symptoms that people experience after cutting back on large sugar intake.
http://healthyeating.sfgate.com/refined-sugar-withdrawal-symptoms-9911.html
http://www.growyouthful.com/remedy/sugar-addiction-recovery.php
One question that came to mind, was the following: If one experiences a sugar withdrawal, what happens if they apply sugar to the tongue, but do not digest it? Does that trick the brain into stopping the sugar withdrawal, or is it far more complicated than that?