A teacher was calling the roll when a boy burst into the classroom. "Why are you late, boy, and where have you been?" the teacher asked.
"Sorry, Sir, I've been up Primrose Hill," said the boy.
"No excuse, detention, sit down!" the teacher replied.
Two minutes later, another boy burst into the classroom. "Why are you late, and where have you been?" the teacher demanded.
"I've been up Primrose Hill," the boy replied.
"No excuse, detention, sit down!" the teacher said. Two minutes later, a girl burst into the classroom.
"Don't tell me!", the teacher raged, "You've been up Primrose Hill as well?"
"No sir", the girl replied. "I AM Primrose Hill."