My aunt has two sons,  one is 5 years old and the other is 7 years old.  One day I go to see my aunt.  Her husband isn't at home.  It's time for lunch and we sit at the table waiting for the dishes.  Now my aunt is in the kitchen.  I hear a talk between her sons.  The 7-year-old boy says: " Dad is not at home.  I am the head of our family.  And I can sit on Dad's chair. " But the 5-year-old boy says: " No. Sit on Mum's chair if you are the  head of our family.