The sexual imagination of the Japanese knows few boundaries, starting with clubs populated by pretend nurses, fake air hostesses and phoney secretaries. Other specialities include: rotating sushi-style breast­fondling clubs; special ‘Marilyn features’ – you watch as she stands over a hot air-vent; naked karaoke; soapgirls, notably ‘handpicked brides’who bathe customers; anime clubs (sex with manga characters); ‘police investigation’ clubs where guests fight over who gets to wear the ‘cuffs; and fake train carriages where up to 14 customers at a time get to grope underdressed women in steamy rush-hour conditions.