in or obsession with anal sex among men. Male to male Behaviors and views Historically, anal sex has been commonly associated with male homosexuality. However, many gay men and men who have sex with men in general (those who identify as gay, bisexual, heterosexual or have not identified their sexual identity) do not engage in anal sex. Among men who have anal sex with other men, the insertive partner may be referred to as the top and the one being penetrated may be referred to as the bottom. Those who enjoy either role may be referred to as versatile. Gay men who prefer anal sex may view it as their version of intercourse and a natural expression of intimacy that is capable of providing pleasure. The notion that it might resonate with gay men with the same emotional significance that vaginal sex resonates with heterosexuals has also been considered. Some men who have sex with men, however, believe that being a receptive partner during anal sex questions their masculinity. Men who have sex with men may also prefer to engage in frot or other forms of mutual masturbation because they find it more pleasurable or more affectionate, to preserve technical virginity, or as safe sex alternatives to anal sex, while other frot advocates denounce anal sex as degrading to the receptive partner and unnecessarily risky. Prevalence Reports regarding the prevalence of anal sex among gay men and other men who have sex with men vary. A survey in The Advocate in 1994 indicated that 46% of gay men preferred to penetrate their partners, while 43% preferred to be the receptive partner. Other sources suggest that roughly three-fourths of gay men have had anal sex at one time or another, with an equal percentage participating as tops and bottoms. A 2012 NSSHB sex survey in the U.S. suggests high lifetime participation in anal sex among gay men: 83.3% report ever taking part in anal sex in the insertive position and 90% in the receptive position, even if only between a third and a quarter self-report very recent engagement in the practice, defined as 30 days or less. Oral sex and mutual masturbation are more common than anal stimulation among men in sexual relationships with other men. According to Weiten et al., anal intercourse is generally more popular among gay male couples than among heterosexual couples, but "it ranks behind oral sex