"You're saying your mother engaged in unprotected sex outside her primary relationship?' 'With some other student,' replied Rosie. 'While she was dating my' - at this point Rosie raised her hands and made a downwards movement, twice, with the index and middle fingers of both hands - 'father. My real dad's a doctor. I just don't know which one. Really, really pisses me off.' I was fascinated by the hand movements and silent for a while as I tried to work them out. Were they a sign of distress at not knowing who her father was? If so, it was not one I was familiar with. And why had she chosen to punctuate her speech at that point ... of course! Punctuation! 'Quotation marks,' I said aloud as the idea hit me. 'What?' 'You made quotation marks around "father" to draw attention to the fact that the word should not be interpreted in the usual way. Very clever.' 'Well, there you go,' she said. 'And there I was thinking you were reflecting on my minor problem with my whole fucking life. And might have something intelligent to say.' I corrected her. 'It's not a minor problem at all!' I pointed my finger in the air to indicate an exclamation mark. 'You should insist on being informed.' I stabbed the same finger to indicate a full stop. This was quite fun."