Carry -- a Colorado college student who had been in a steady relationship for months -- was recently cajoled by her boyfriend into some sexual experimentation.

He wanted to try anal sex, and even though the 20-year-old said she was "OK with the idea," she nervously downed several drinks before their lovemaking began.

Within 15 seconds, Carry -- not her real name -- said she was "crying and asking him to stop."

full story: Anal Sex on Rise Among Teens