Don't be a doucher.

While the evidence may not be concrete, researchers have found that douching may increase the risk of contracting STDs. Seems that trying to make one's snatch smell like a meadow after a fresh spring rain may have a significant downside. However, I have to wonder what the correlation here really is. Logic would dictate that if a girl is regularly douching, then she's probably also fucking on a higher frequency than her non-douched peers. Apparently the real issue has to do with douche washing away beneficial micro-organisms that help keep STIs from taking hold.

Results of a study provide "convincing evidence," researchers say, that douching increases the risk of sexually transmitted diseases.

Among a group of sexually active adolescent girls, those who said they always practiced vaginal douching were nearly two times more likely to have a sexually transmitted disease (STD) than girls who said they never douched, the researchers found.

"Douching is a harmful activity because it disrupts the healthy vaginal microorganisms and enables STIs to take hold," Dr. Sten H. Vermund of Vanderbilt University School of Medicine, Nashville, Tennessee, told Reuters Health.

"Overwhelming evidence from biomedical research suggests that douching is harmful for women's health," Vermund added.

He and his colleagues studied the douching habits over 3 years of 368 sexually active girls who were nearly 17 years old on average.

During follow-up assessments, 88 of the girls never reported douching. Compared with this group, as well as the girls who intermittently reported douching, the 50 girls who reported always douching had a shorter time to acquiring a sexually transmitted infection.

When the investigators allowed for other factors associated with STDs, including race and age, as well as HIV status and baseline sexual history, the risk for STD was nearly twofold greater for girls who always douched compared with those who never douched.

In the American Journal of Obstetrics and Gynecology, the investigators note that this study is the first to follow girls over time, and to ensure that douching practices preceded incident STDs. Previous studies that suggested douching as a risk factor for STDs could not determine if douching was practiced in response to the STD symptoms.

Vermund concludes, based on this study and others, that "adolescents and women should be discouraged from douching unless guided to do so by a doctor."
- Source

So, moral of the story: if you're gonna be skanky, let your natural skank shine forth instead of covering it up with douche.