Most instances of anal cancer are related to infection with the human papilloma virus . Anal intercourse alone doesn’t cause anal most cancers; the risk of anal cancer via anal intercourse is attributed to HPV infection, which is often contracted by way of unprotected anal sex. Factors predictive of ache throughout anal intercourse include insufficient lubrication, feeling tense or anxious, lack of stimulation, as well as lack of social ease with being homosexual and being closeted. As with other sexual practices, people with out sound information in regards to the sexual risks concerned are susceptible to STIs. It could also be due to these views that condom use with anal intercourse is often reported to be low and inconsistent across all groups in varied international locations. The anal sphincters are normally tighter than the pelvic muscles of the vagina, which might enhance the sexual pleasure for the inserting male throughout male-to-feminine anal intercourse due to the strain applied to the penis.