vi Contents Unit 8 Human Sexuality . . . . . . . . . . . . . . . . . . . . . . . 604 Chapter 19 Understanding Sexuality . . . . . . . . . . . . . . . . . . . . . . . . 606 Lesson 19.1 What Is Sexuality? . . . . . . . . . . . . . . . . . . . 608 Lesson 19.2 Sexual Feelings and Behavior . . . . . . . . . 618 Lesson 19.3 Unwanted Sexual Activity . . . . . . . . . . . . 627 Chapter 19 Review and Assessment . . . . . . . . . . . . . . 635 Chapter 20 Making Responsible Sexual Decisions . . . . . . . . . . . 638 Lesson 20.1 Pregnancy Prevention . . . . . . . . . . . . . . . 640 Lesson 20.2 Teen Pregnancy and Parenthood . . . . . 653 Chapter 20 Review and Assessment . . . . . . . . . . . . . . 659 Glossary/Glosario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 662 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665