Your pictorial brain anatomy is wrong. For males there is the "sleep all the effing time" lobe that is about 40-50% of the total brain. At least that is my boy. Straight A's in advanced placement classes, a sports stud, honor society and math club. When this guy comes home he is brain dead.
Well see, he's focusing all that energy on school, nothing left by the time he get home. Boys, at least, can be reasoned with, girls on the other hand....