Book excerpt: Celebrating sexual diversity in contemporary America. Human Sexuality: Diversity in Contemporary America takes a sex-positive approach, encouraging students to become proactive about their own sexual wellbeing. Presented in an integrated, digital learning program, Yarber & Sayad's contemporary research and exploration of cultural diversity provide a personalized learning experience for today's students. The new edition of SmartBook, a personalized learning program offering students the insight they need to study smarter and improve classroom results.