false sense

Suppose there are two cup noodles A and B.If A is put on B,B looks bigger than A according to the false sense theory that was featured at the TV program last night.I thought out the reason of my own that it might be due to the length gap at the contact surface when we look them from sideway.We tend to grasp such object like cup noodle having vertical sideline though it actually has a slight taper line ,as you know, that gives us such false illusion.

Another idea,by the way,came across my mind is that when we put them upside down top one must look bigger,on the contrary.Then,my imagination shifted to the case of hair style arrangement.Suppose there is a woman with heavy-joweled face,she may look better with bobbed hair according to the false sense theory.