The act of moving a penis, sex toy or other object straight from the anus to the mouth, usually without washing it or changing a condom or barrier in between. Often shortened to ATM or A2M, the term mostly comes from porn and typically describes anal sex followed immediately by oral sex.
Related variations include ass to other mouth (ATOM or A2OM), where the penis or object goes from one person’s anus to someone else’s mouth, sometimes written in older porn slang as ATOGM or A2OGM (“ass to other girl’s mouth”), and ass to pussy (ATP or A2P), where it moves directly from the anus to the vagina.
The appeal is often as much psychological as physical. Some are excited by breaking a strong taboo about cleanliness, while others experience it as an act of submission or of devotion to and acceptance of a partner’s whole body. Some value the trust and vulnerability it involves, others the messy, uninhibited feel of moving between acts without pausing. For some it is a form of anal play or anal worship, sometimes extending to the taste or smell of a partner on used plugs, beads or other toys. In threesomes and group sex, the “other mouth” variation can add sharing, exhibitionism or competition. Its popularity in porn suggests many people also enjoy watching it.
Safety & Consent
Ass to mouth can carry tiny amounts of fecal material from the rectum into the mouth. Research on sexually transmitted intestinal infections names oral sex after anal penetration as a possible route for bacteria such as Shigella, Campylobacter and E. coli, and for parasites like Giardia, and hepatitis A can also pass through fecal–oral contact. The usual risks of oral sex, including gonorrhea, syphilis, herpes and HPV, apply as well. Avoiding it during or soon after a stomach or bowel illness, staying current with hepatitis A and B vaccination and STI testing, and using barriers can all reduce the risk.
