Some gay men who have unprotected anal intercourse avoid ejaculation-they practise 'withdrawal'.

Bisexual identity was not statistically associated with unprotected anal intercourse with men.

We then discuss the evidence relating anal intercourse and HIV with sexual violence.

Significant correlates of HIV seropositivity included anal intercourse, history of past STD, and syphilis.

Unprotected anal intercourse (UAI) did not discriminate among the HIV testing groups.

Seroincident HPV16 was associated with younger age and unprotected anal intercourse with HIV-positive partners.

Abstract AIDS: The range of sexual agreements among gay men regarding anal intercourse is explored.

True withdrawers did not differ in sexual adventurousness from other men who had anal intercourse.

By study design three quarters of participants were HIV-uninfected and engaged in condomless receptive anal intercourse.

Condom use during receptive anal intercourse did not affect the association between rectal bleeding and HIV infection.

Many gay couples do not indulge in anal intercourse and on the other hand many married couples do.

Results: Having sex with women, regardless of sexual identity, increased the likelihood of insertive unprotected anal intercourse with men.

Regression analysis indicated that unprotected anal intercourse was the main risk factor among HIV-prevalent cases but not in HIV-incident cases.

The majority of the HIV infections prevented by PEP were among men and women who reported receptive anal intercourse exposure.

Results showed overall agreement with a basic definition of bareback sex as condomless anal intercourse, but considerable variation on other elements.

We examined HIV optimism and unprotected anal intercourse (UAI) in a nationwide sample of gay and homosexually active men.