My friend likes to read his two young sons fairy tales at night. Having a deep-rooted sense of humor, he often ad-libs parts of the stories for fun.

One day his youngest son was sitting in his first grade class as the teacher was reading the story of the Three Little Pigs. She came to the part of the story where the first pig was trying to acquire building materials for his home.
She said "...And so the pig went up to the man with a wheelbarrow full of straw and said "Pardon me sir, but might I have some of that straw to build my house with?"

Then the teacher asked the class "And what do you think that man said?" and my friend's son raised his hand and said "I know! I know! He said 'Holy S........!! A talking pig!'"

The teacher was unable to teach for the next 10 minutes.