The main character, Yossarian is talking to Luciana, an Italian prostitute he just slept with.

    His heart cracked, and he fell in love. He wondered if she would marry him.
    'Tu sei pazzo,' she told him with a pleasant laugh.
    'Why am I crazy?' he asked.
    'Perchè non posso sposare.' she answered.
    'Why can't you get married?'
    'Because I am not a virgin,' she answered.
    'What has that got to do with it?'
    'Who will marry me? No one wants a girl who is not a virgin.'
    'I will. I'll marry you.'
    'Ma non posso sposarti.'
    'Why can't you marry me?'
    'Perchè sei pazzo.'
    'Why am I crazy?'
    'Perchè vuoi sposarmi.'
    Yossarian wrinkled his forehead with quizzical amusement. 'You won't marry me because I'm crazy, and you say I'm crazy because I want to marry you? Is that right?'
    'Si.'
    'Tu sei pazz!' he told her loudly.
    'Perchè?' she shouted back at him, and smacked him loudly and flamboyantly on the chest with the back of her hand. 'Non posso sposarti! Non capisci? Non possso sposarti.'
    'Oh, sure, I understand. And why can't you marry me?'
    'Perchè sei pazzo!'
    'And why am I crazy?
    'Perchè vuoi sposarmi.
    'Because I want to marry you. Corina, ti amo,' he explained, and he drew her gently back down to the pillow. Ti amo molto.'
    'Tu sei pazzo,' she murmured in reply, flattered.
    'Perchè?
    'Because you say you love me. How can you love a girl who is not a virgin?'
    'Because I can't marry you'
    She bolted right up again in a treatening rage. 'Why can't you marry me?' she demanded, ready to clout him again if he gave an uncomplimentary reply. 'Just because I am not a virgin?'
    'No, no, darling. Because you're crazy.'