Harder, Better, Longer, Stronger: Science, Skills, and Secrets for the Best Sex of Your Life (Hardback)"The Sex Playbook Men Were Never Given From a Coach Whos Helped Millions" A practical, evidence based, no BS guide from sex coach Caitlin V for men who want to take charge of their sex lives lasting longer, staying harder, and building the confidence and connection theyve always wanted in and out of the bedroom.