I was taking a photo of my Chinese friend. Suddenly she swore (骂) at me. “Why are you doing that?” I cried. It took a long time before she realized why I was upset. Even then she didn’t understand. Showing someone two fingers – why would that be rude? It was just like saying “cheese” to the camera. It means no harm in China. But in the UK, putting two fingers up at someone is very rude in fact.