Living With A Male: Reprise

toast with bite What is it about the genetic makeup of a male that causes them to leave slices of bread in the toaster, not pushed down to fully cook, with one bite out of the corner, for the girlfriend to find upon waking up hours after he has left for the day? It's located on a chromosome that causes them to repeat such behaviors on a daily basis, and it is right next to the genes LEAVE TOILET SEAT UP and WASH DISHES TWICE A YEAR.