[Siegmund Freud]

The daughter wants go to a party. The mother make a talk with the daughter. "Be carefull. When a boy wants to touch your breast you shall say: "NO". When he want between your legs say "STOP".
A few weeks later the daughter told her mother: I´m pregnant.
The mother became angry. "I told you: When a boy wants to touch your breast you shall say: "NO". When he want between your legs say "STOP".
The daughter: I made it this way. When he want to touch my breast I said "NO", when he wants between my legs I said "STOP". And I said it all the time: NO - STOP - NO - STOP - NO - Stop!