I wrote a book report on a biography of Bill Gates when I was 7 or 8. It contained a youthful anecdote about his mother calling him on the house's intercom and him replying after several ignored attempts that "[he was] busy thinking. Maybe [she] should try it sometime!"

An intercom? In a house? So that your mother didn't have to repeatedly yell up the stairs to your brother that food is on the table? Sure sounded like rich person stuff to me.