The children were having the sex education class when the teacher asked, "Who can tell me what breasts are?"
"My mummy has breasts," replied little Sarah, "She has two of them."
"Very good Sarah." said the teacher, "Now who can tell me what a penis is?"
"I know!" little Johnny shouted out, "My daddy has two of them!"
"Two of them?" asked the teacher, "Are you sure?"
"Yeah," replied Johnny, "One of them is wrinkly and about the same size as mine and the other is about seven inches long and he uses it to brush mummy's teeth with!"