They must have made an incongruous trio as they drank together in the Conservatory wine bar in London's West End - Rosie, a tubby, 19-year-old virgin in sloppy student clothes, Jess, her 27-year- old, crop-haired lesbian lover, and Tom, the besuited, middle-aged businessman keen to pay more than £8,000 to fulfil his lifetime ambition of sleeping with a virgin.