Sex By Numbers: Everything you need to know about sex and a few things you shouldn't

Sex by Numbers is packed with fascinating facts and lists which answer every question you have about sex. From the most potent sexual positions and best ever oral techniques to the top ten classic parody porn titles, this light-hearted but essential guide includes everything you have ever wondered about: The body - a guide to erogenous zones, massage, masturbation and sexual positions; Sexual accessories - including sex toys, orgasm-boosting condoms and household objects to help you climax;...