/ot/ - off-topic

The human anorectum is highly unsuited for many all-too-common receptive activities. That is due to the fragility of the anorectal region. Contributing factors include:

• Anatomy — Not far inside there are very delicate and pain-insensate tissues (including simple columnar epithelium, a lining that some enemas and lubricants can inflame and even remove).
• Neuromuscular physiology — The internal anal sphincter is involuntary and relaxes with rectal distension. The external anal sphincter and puborectalis completely relax as a person bears down, causing hemorrhoidal cushions to engorge and increasing the cushions' fragility.

There are many potential traumatic consequences of such activities, including abrasion and tearing; damage to muscle and connective tissues; colorectal perforation; hemorrhoidal disease, such as internal hemorrhoidal prolapse; rectal prolapse (originating from further inside); and inflammation. All of those can lead to even more issues: bacterial infection followed by abscess / fistula / life-threatening systemic sepsis; fecal incontinence; anatomic stenosis (narrowing due to constricting scar tissue called a stricture); and one or more anal skin tags (scar tissue e.g. from a healed tear, a sentinel tag associated with a chronic anal fissure, or a remnant of external hemorrhoidal thrombosis).(USER HAS BEEN PUT OUT TO PASTURE)