The University of California. Anal sex alone does not cause anal cancer; the risk of anal cancer through anal sex is attributed to HPV infection, which is often contracted through unprotected anal sex. Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person's anus , or anus and rectum , for sexual pleasure. The Johns Hopkins University Press. When asked what techniques they used in their last ten sexual encounters, lesbians in their 30s were twice as likely as other age groups to engage in anal stimulation with a finger or dildo. Introducing the New Sexuality Studies 2nd ed. Retrieved December 15,
How to Lose Your Anal Virginity… With Style
American Journal of Public Health.