How can any grown adult use the term "potty-mouth" without cringing in embarassment?

[Robb, Sam]

> a)  The term "potty mouth" is a euphemism for "profanity" 
> and/or "obscenity" and/or "swearing".

True; but the rest of your argument is predicated on the
idea that "potty mount" is *only* a euphemism.  IMHO, there
are some nuances implied by using the term.

In my experience, at least, it's used primarily when a child
says something profane *primarily* to offend, embarass, or
just to make someone who objects to that sort of language
uncomfortable. They don't care about the word itself, they
just want to get a reaction out of someone else.

Use of the term was intended, I think, to convey the idea
that leaving the (purportedly) obscene material in the
fortune data files as plain text didn't really serve any
useful purpose, unless that purpose was to intentionally
offend. 

-Samrobb