Primary lessons learned from Naughty Marietta: don’t wiggle raw, unrefrigerated shrimp in a woman’s face as a way of flirting. This very loosely adapted version of a wildly confusing operetta stars Jeanette MacDonald as a French… Princess? who runs away to New Orleans to escape marrying some Spanish duke, and ends up falling for a rakish captain played by Nelson Eddy.  Musical numbers ensue, including a completely bonkers puppet show.