On the night of Mr. Melvyn's murder, Fatmo was trying to get his older brother, Lil'mo, to stop yapping about the woman he'd seen in a supermarket.     He tried in vain to tell Lil'mo about a fascinating book, he'd seen advertised on the Internet. The book was by Lucien Freud and was called "How I learned to live with sex". But his brother wouldn't listen.