Well basically, it is really nasty it can be known as Coprophilia. Here's the link to read about it:

http://en.wikipedia.org/wiki/Coprophilia

The term "coprophilia" refers to the abnormal interest, sexual urges, or fantasy in feces and defecation. It is also called scat. It is classified as a form of psychological disorder.

A shotgun to the head could stop it.

Yes it can. At least I believe it can.

-Darius

People who engage in coprophilia are typically individuals who have a sexual interest in feces. This fetish can vary in intensity and can be expressed through various behaviors, such as viewing, touching, tasting, or smelling feces. Coprophilia is considered to be a rare and taboo sexual interest.