This is the
same as golden showers except that it involves the use of faeces
and has more variety. For example, some people like to watch
their partners defecating, some actually enjoy eating the faeces
or rubbing it into their bodies and an extreme version is
to have the mouth used as a toilet bowl, in other words, the other
person defecates right into the mouth of the recipient.
Psychologists have a
field day analysing this type of behaviour in terms of anal retention
and self-hatred, but the truth of it is that some people genuinely
get turned-on by this behaviour. There's no way for me to
suggest scatting can ever be hygenically executed, but I guess that
wouldn't be a high priority for people who enjoy playing with faeces
in any form!