Is it humanly possible just to eat one doughnut?

I have been a conniseur(?) of doughnuts for many years and everyone knows why. before i walk into a doughnut shop, i tell myself that i have a limit on my doughnut purchase, no more than three. do the doughnut shops intentionally have fans that blow the smell of fresh cooking doughnuts, thats like magic over your sensibilities? instead of three, you want to buy the whole store. what overcomes humans to go crazy in a doughnut shop? my limit is three, or maybe four or….......what the hell, i ate a whole dozen of freshly baked doughnuts at one time. do you have doughnut willpower or are you a whimp like most of us?