* Not for the faint hearted.

From The New Joy Of Gay Sex, which I'm casually flicking through:

Scat
A small minority of gay men like to make feces a part of the sex scene.
...
Rather than using shit to degrade themselves and each other, they use it in a variety of metaphoric, even ritulastic ways, often without touching it: experienced it being produced by another; sometimes adoring it (in almost the same way that infants play with it as a marvellous product of their own body; stuffing it into condoms and using it as a substitute penis.

Emphasis mine. As is the revulsion.

It'll be a sad, sad day when I shit into a condom and use it as a dildo.