Edge play is dangerous; do not try this at home!
Scat play may involve the smearing of feces upon a human and/or ingestion of it.
Scat (Greek: σκατά, skatá-shit), brown showers, or Coprophilia (from Greek κόπρος, kópros—excrement and φιλία, philía—liking, fondness), also called scatophilia, is the paraphilia involving sexual arousal and pleasure from feces. In the Diagnostic and Statistical Manual of Mental Disorders (DSM), published by the American Psychiatric Association, it is classified under 302.89 – Paraphilia, NOS (Not Otherwise Specified) and has no diagnostic criteria other than a general statement about paraphilias that says "the diagnosis is made if the behavior, sexual urges, or fantasies cause clinically significant distress or impairment in social, occupational, or other important areas of functioning". Furthermore, the DSM-IV-TR notes, "Fantasies, behaviors, or objects are paraphilic only when they lead to clinically significant distress or impairment (e.g. are obligatory, result in sexual dysfunction, require participation of nonconsenting individuals, lead to legal complications, interfere with social relationships)".
Some human coprophiles engage in coprophagia (the eating of feces) as a sexual fetish. Until 1995, the only documented cases of coprophagia in humans were those with schizophrenia or other mental illness, but it has now been shown to occur among mentally healthy individuals.
Consuming other people's feces carries the risk of contracting diseases and bacteria spread such as E. coli, Hepatitis A, Hepatitis E, pneumonia, polio, and influenza. Coprophagia also carries a risk of contracting intestinal parasites should they be present.
Lewin reported that "... consumption of fresh, warm camel feces has been recommended by Bedouins as a remedy for bacterial dysentery; its efficacy (probably attributable to the antibiotic subtilisin from Bacillus subtilis) was confirmed by German soldiers in Africa during World War II".
The introduction of foreign bacteria into the human gastrointestinal tract via infusion of fecal enemas is an established medical practice in cases of ulcerative colitis, especially where the patient's own intestinal flora has been significantly depleted by prior use of antibiotics.
Coprophagia has been observed in a small number of patients with schizophrenia, depression, and pica.
Centuries ago, physicians used to taste their patients' feces, to better judge their state and condition.
Fecal bacteriotherapy is when feces from a close relative or spouse are given to patients suffering from intractable diarrhea caused by Clostridium difficile. The objective is to repopulate the intestines with the normal gut flora (intestinal bacteria) which kill the clostridium. The healthy stool is administered by nasogastric tube, enema, or in a capsule.