Researchers have found that cutting is linked to higher levels of risky sex among teenagers.

This could lead many to hide their sexuality and engage in furtive, perhaps riskier sex.

Though they have secure families, education, and the information and support they need to avoid risky sex, too few of their peers do.

Girls and young women who frequently use drugs or alcohol are more likely to engage in risky sex or be the victim of sexual assault.

Far from teaching greater sexual caution, such experiences can be precursors to depression, risky teenage sex and early pregnancy, studies in recent years have shown.

Young people decide whether to have risky sex based on whether they see their partner as "clean" or "unclean."

Together they pick up other couples and have the kind of risky, anonymous sex that people in the 90's aren't supposed to have anymore.

The most common source of infection could easily be risky, unprotected sex, which, despite denials by prison officials, is clearly a regular occurrence behind bars.

But in neighborhoods where self-esteem runs low and desperation high, he said, women often pursue risky sex as aggressively as men.