The 10-volume "Health Facts" series is intended to supplement health education curricula and provide a handy reference for individuals who would like additional background information on particular health topics. The emphasis is placed on topics and examples relevant to youth of middle and high school age. The seven sections in this book on sexuality provide teachers with basic facts about: sexuality in general; the anatomy and physiology of the male and female reproductive systems; pregnancy and birth; contraceptives; puberty and adolescence; and a range of adolescent sexual behaviors and the differences between love and sex. An easy to read reference format offers clear, concise data intended to familiarize educators with the most important facts about the issues and concerns. A glossary, a list of resources, and 16 references complete the volume. (LL)