With anal sex, the anus can play a role in sexuality. Attitudes toward anal sex vary, and it is illegal in some countries. [5] The anus is often considered a taboo part of the body, [5] and is known by many, usually vulgar, slang terms. Some sexually transmitted infections including HIV/AIDS and anal warts can be spread via anal sex. a b Komisaruk, Barry R.; Whipple, Beverly; Nasserzadeh, Sara; Beyer-Flores, Carlos (2009). The Orgasm Answer Guide. JHU Press. pp.108–109. ISBN 978-0-8018-9396-4 . Retrieved January 20, 2014. The anus is the final part of the gastrointestinal tract, and directly continues from the rectum. The anus passes through the pelvic floor. The anus is surrounded by muscles. The top and bottom of the anus are surrounded by the internal and external anal sphincters, two muscular rings which control defecation. [6] :397 The anus receives blood from the inferior rectal artery and innervation from the inferior rectal nerves, which branch from the pudendal nerve. [7] Microanatomy Intra-rectal pressure builds as the rectum fills with feces, pushing the feces against the walls of the anal canal. Contractions of abdominal and pelvic floor muscles can create intra-abdominal pressure, which further increases intra-rectal pressure. The internal anal sphincter (an involuntary muscle) responds to the pressure by relaxing, thus allowing the feces to enter the canal. The rectum shortens as feces are pushed into the anal canal and peristaltic waves push the feces out of the rectum. Relaxation of the internal and external anal sphincters allows the feces to exit from the anus, finally, as the levator ani muscles pull the anus up over the exiting feces.

Anorectal Abscess". Johns Hopkins Medicine. Archived from the original on 10 August 2021 . Retrieved 10 August 2021.A GREAT FAMILY GAME FOR ADULTS AND KIDS: Looking for fun new family card games or family-friendly animal quizzes? This new and amusing card game is loved by adults and teenagers and makes a hilarious party game to play with friends and family! Makes a great travel game that can also be played at home on the sofa, or at a table. It’s a perfect addition to holiday games!

Rosenthal, Martha (2012). Human Sexuality: From Cells to Society. Cengage Learning. pp.133–135. ISBN 978-0-618-75571-4 . Retrieved September 17, 2012. Anal abscesses usually result from infection of the normal glands of the anus, or sometimes because of Crohn's disease. [9] They usually occur to the sides of the sphincters, and between the internal and external sphincters, either on the surface, or deeper. They may get bigger, enlarging in the direction of the rectum, and resulting in an abnormal connection called an anorectal fistula. They are usually managed with surgical drainage [9] and antibiotics. [10] [11] The pseudostratified columnar epithelium of the gastrointestinal tract transitions to stratified squamous epithelium at the pectinate line. The stratified squamous epithelium gradually accumulates sebaceous and apocrine glands. [8] :285 DevelopmentThe anus has a relatively high concentration of nerve endings and can be an erogenous zone, which can make anal intercourse pleasurable if performed properly. The pudendal nerve that branches to supply the external anal sphincter also branches to the dorsal nerve of the clitoris and the dorsal nerve of the penis. [14]