"Anal intercourse" refers to a sexual activity involving the insertion of a penis or other objects into the anus, which is a part of the body located between the buttocks. Full definition
Consequently, anal intercourse leads to leakage of fecal material that can easily become chronic. (faith.org.uk)
At trial, he admitted that he engaged in anal intercourse with the complainant and claimed she had consented. (canadianlawyermag.com)
With respect to the oft - cited passage of Romans 1:26 f. we must notice that Paul's mention of anal intercourse between males functions as an illustration of the consequence of God's having abandoned the gentiles to their own wickedness. (religion-online.org)