According to a 1995 National Center on Addiction and Substance Abuse study, teens who smoke marijuana are 85 times more likely to use cocaine than non-marijuana smokers. They like the feeling or being drunk or high. To help them cope with problems. To feel like an adult. Drinkers are 3 times more likely to have sex without using a condom than sexually active non-drinkers.
Drinkers compensate by driving with increased caution.
Any of these. Substance use even without needle use contributes significantly to HIV transmission due to associated at-risk behaviors. All of these. Detailed descriptions of sexual effects of drugs used in certain manners. In Mom's makeup case.