I know Mark,' I reply. 'And I don't like him.' 'But I do. And part of being social means being civil to someone you don't like.' 'That's stupid. It's a huge world. why not just get up and walk away?' 'Because that's rude,' Jess explains. 'I think it's rude to stick a smile on your face and pretend you like talking to someone when in reality you'd rather be sticking bamboo slivers under your fingernails.