I absolutely concur with Lotus that once you start taking NBE, there is a significant likelihood that your interest in changing will accelerate, and that all of your rational processes and prior planning will be subject to a little voice that will whisper sweet, enticing nothings in your ear such as "oh, just take a little more, or maybe a lot more, because it just feels so good and maybe you'll wake up tomorrow with a gorgeous face and hips and breasts to die for."

Seriously, I think something does happen in the brain, and walking away from the process grows much less likely once you have boarded the train. I know that when I stop, I just don't feel whole or right, like I am missing something that I really like.