‘Well I suppose we can have sex,’ she said suddenly, now in dramatic opposition to her standpoint a moment before. It was as though a thought had just popped in. And it had. But she knew her (for now) boyfriend would jump at the chance, his male lust eradicating any thoughts of ‘hang on, why has she just changed her mind.’
They fucked and when he was about to cum she started screaming the name of her ex. He stopped disgusted. She laughed at him.
Incredibly they stayed together for another nine months.
Sigmund Fraud Books 