‘Frankie and Johnny’ review: More than skin is bared in tender revival

His-and-her nudity is front and center in “Frankie and Johnny in the Clair de Lune” — but this rom-dram’s success isn’t measured in flesh alone.

Audra McDonald and Michael Shannon both bare their bodies and their feelings as Frankie, a guarded waitress, and Johnny, a pushy cook in the same greasy spoon, whose one-night stand could lead to more. So exposed are they that the revival that opened Thursday should be rated X-hilarating.