You've always got blood sugars at some level. If you put something sweet into your mouth (real sugar or fake) you're more likely to a) produce insulin and star

You've always got blood sugars at some level. If you put something sweet into your mouth (real sugar or fake) you're more likely to a) produce insulin and start metabolising those blood sugars, and b) have a 'low blood sugar' feeling and want to eat something :) Edited for typo