Funny Dirty Joke

Johnny's daddy is the principle of the school.
He saw his teacher leaving school.
Johnny: ''Hey miss where you going?''
Teacher: ''Home.''
Johnny: ''Can I come with?''
Teacher: '' No!''
Johnny: '' I'm gonna tell my daddy!''
Teacher: ''Fine.''
They arrive at the teachers house...
Teacher: ''Johnny i'm going to take a shower.''
Johnny: ''Can I come?''
Teacher:''No!''
Johnny: ''I'm gonna tell my daddy.''
Teacher:''Fine.''
They are in the shower...
Johnny: ''Can I touch your belly button?''
Teacher: ''No.''
Johnny: ''I'm gonna tell my daddy.''
Teacher: ''Fine.''
Teacher: ''Errr... Johnny thats not my belly button!''
Johnny: '' Thats not my finger.''