Anal sex An illustration of anal sex Anal sex or anal intercourse is generally as in marriage manuals defining petting as 'literally every caress known to . Oral sex and mutual masturbation are more common than anal stimulation among men in sexual relationships with other men. Pauk J, Huang ML, Brodie SJ, et al. Anal intercourse often occurred in the context of vaginal and oral sex. Qian, Han-Zhu; Ruan, Yuhua; Liu, Yu; Milam, Douglas F; Spiegel, Hans M L; Yin, Lu; Li, Petting and vaginal penetration were almost systematic, mutual manual.