Compare and contrast heroin and cocaine in terms of the physiological properties of the drugs, the forms in which the drugs are normally taken, and the prevalence of abuse of each. What is the allure of the club drug known as MDMA (Ecstasy)? Discuss three of the dangers of using this drug. How does MDMA operate in the brain? Explain the problematic behavior of college binge drinking. Discuss the best treatment for female orgasmic disorder, including what the treatment entails as well as any controversial issues. What is gender dysphoria? Discuss the biological explanations for the disorder. In addition, discuss the treatment options for the disorder. What are some sociocultural causes of low sexual desire?  What is "sexting?" Then, explain if this practice is considered normal or abnormal?