Paul and Mary get married but couldn't afford a honeymoon - so they 
go back to Paul's Mum and Dad's house for their first night together..
  In the morning Johnny - Paul's little brother - gets up and has his 
breakfast.
  As he is going out of the door to go to school - he asks his mum if 
Paul and Mary are up yet.
  She replies - No.
  Johnny asks - Do you know what I Think ?
  His mum replies - I don't want to hear what you think ! Just go to  school.
 Johnny comes home for lunch and asks his mum -
  Are Paul and Mary up yet ? 
Johnny says - Do you know what I think ?
His mum replies - Never mind what you think ! Eat your lunch and 
go back to school ..
 After school - Johnny comes home and asks again - Are Paul and Mary 
up yet ?
 His mom says - No. He asks - Do you know what I think ?
  His mom replies - Ok - now tell me what you think
  He says - Last night Paul came to my room for the Vaseline and I 
think..
  I gave him my airplane glue.