Omg, it just sounds so bad.

Here's an excerpt:
Unfortunately, women tend to think that if they don't use drugs or engage in "risky" sexual behavior, they are safe. But this attitude ignores the reality that their partners may be engaging in unsafe behaviors. "A woman thinks that if she's monogamous, [she is] protected from being infected," says Michael Lindsay, M.D., an associate professor of obstetrics and gynecology at Emory University School of Medicine in Atlanta. "There's an assumption that her partner is also monogamous, and that may not be the case. It really is the status of the partner that puts a woman at risk."

Women are at greater risk of being infected with HIV than are men, primarily because of their anatomy. During intercourse, a woman often gets tiny tears or abrasions in the vaginal area; if her partner is infected with HIV and they're having unprotected sex, these tears can serve as ports of entry for HIV, explains Dr. Lindsay. Having another sexually transmitted disease, such as herpes, gonorrhea, syphilis or chlamydia, also increases a woman's risk of infection, because inflammation makes it easier for HIV to enter the skin. Since some STDs are asymptomatic, and thus go undiagnosed, many women may be at risk for HIV without even realizing it.

Condoms are still the best protection against being infected with HIV. However, nonoxynol-9, a spermicide which was once believed to protect against the virus, can actually increase the risk of transmission by irritating vaginal tissue.

I especially like the tears part.