[GhostWhisperer]

it's obvious you don't have kids, or have ever been in a position of tutoring someone else's kids

[yetihehe]

Some children really enjoy dirty jokes, it's typically adults who react negatively to dirty jokes from kids.

[fileeditview]

Children will be totally distracted by things like that. Instead of concentrating on the actual task/goal they will focus on funny/silly words and this is not helping in teaching them something.