One of the lesser-known BDSM practices is the idea of using your slave as a human toilet, i.e. urinating or defecating on him in order to humiliate him. This is frequently done in his mouth or on his face. Consumption of feces or urine sometimes occurs, although you need to be aware of the health risks involved.

Feces is made up of the following: 75% is water, and of the remaining 25%, 1/3 of it is dead bacteria, and another third is undigested food products. There can certainly be live bacteria in feces that will pose a risk to both parties, however.

Although psychology recognizes the existence of urine and feces fetishes (the former is known as urophilia, undinism or urolagnia, while the latter is called coprophilia), there is no real answer as to what causes them.

In the femdom world, a urine fetish is known as watersports, and the main purpose of it is humiliating the slave. Pressuring him to consume your urine is another method of asserting your dominance over him.

In femdom, a feces fetish is known as scat play. A very few couples also practice coprophagia, which means eating feces. This activity is physically dangerous because of the possibility of getting a serious infection from live bacteria. Eating your own feces is safer than eating a partner’s feces, but it is still dangerous. Ingesting feces can lead to such health problems as parasitic infections like amebiasis, campylobater, cryptosporidiosis, giardiasis, and higellosis, or even viral hepatitis. If your immune system is compromised, scat play should be avoided as much as possible because it can be seriously harmful to your health.

There are porn videos available that illustrate watersports or scat play, and this may be a safer way of indulging in the practice.