In a group discussion as part of the study, young men said anal sex was something they do for competition. The researchers said describing events as "slips" may enable men and women to avoid confronting the possibility that a non-consensual penetration was deliberate. A lot of guys didn't really like it Young men in the study were often keen on the idea of anal sex, but were sometimes unenthusiastic about the physical reality, the researchers said. The researchers also found that condoms don't seem to be a frequent element in anal sex, and when they were used, it was for hygiene purposes not STD prevention. However, the findings may not be generalizable to all populations, because they are based on a small study of heterosexual teenagers. Teens don't know they can get STDs from unprotected anal sex The researchers found that many interviewed teenagers didn't know it is possible to get a sexually transmitted disease STD from unprotected anal sex. Even though not all the young men in the study said they wanted to have anal sex, many of them said men encourage one another to try the practice. The researchers found that the teenagers thought women would generally be reluctant to have anal sex, and would participate only if persuaded, or even coerced into it, and that the act might hurt them. For example, one interviewee said: Originally published on Live Science. But the researchers said pornography appears to be only one factor in why teens may have anal sex, and the new findings suggest there are also other explanations and motivations involved. Although she said she was persuaded by her partner to engage in anal sex, she also told the researcher that she was curious about trying it, and had enjoyed her experience. The results showed that most teens' anal sex experiences occurred in a relationship setting, but first experiences with anal sex were rarely under circumstances of mutual exploration of sexual pleasure. But both men and women said anal sex could damage women's reputations. Teen Anal Sex Study: The results also revealed somewhat surprising, and in some cases concerning, aspects of anal sex.