David Tennant has joined the cast of love triangle comedy The Joys of Sex. The book was erotic, funny, and wholesome, reinventing sex and love for ordinary people and giving them permission to enjoy sex for the first time ever.” This page contains content provided by Google reCAPTCHA. We ask for your permission before anything is loaded, as Google reCAPTCHA may use cookies and other technologies. To view this content, choose 'Accept and continue' to allow Google reCAPTCHA and its required purposes.