Anyone know a cure for a missing off button?

It's true, I'm completely devoid of an off button! You know the one that allows you to stop after one chocolate biscuit, or switch off after just 2 glasses of wine? I think I may have been born without one and and am missing the gene responsible for controlling over-consumption of indulgent and wickedly delicious food and beverage.  For that reason I don't keep much in the way of sweet stuff in the house. When I do, I have to buy his and her treats so my long suffering fiance can stash his at the back of a cupboard where I can't find them!