It works both ways:

Mrs. Smith sues her neighbour Mr. Jones, charging that he defamed her by calling her a pig.
The Judge finds Mr. Jones guilty and imposes a $100.00 fine.
Mr. Jones asks the judge: "Does this mean that it is illegal to call Mrs. Smith a pig?"
"This is correct", says the judge, "you cannot call Mrs. Smith a pig"
Mr. Jones thinks for a moment and then asks: "Is it also illegal to call a pig Mrs. Smith?"
"No", answers the judge, "there is no law against calling a pig Mrs. Smith."
Mr. Jones turns to Mrs. Smith and says: "Good afternoon, Mrs. Smith!"