We’ve had slow zombies, fast zombies, and funny zombies. Now, with “Warm Bodies,” romantic zombies have shuffled into the mix.

That sound you hear? It’s “Night of the Living Dead” diehards collectively retching.

If only “Warm Bodies” were as easy to dismiss as merely some sort of corporately contrived, bandwagon-hopping boondoggle. Based on a novel by Isaac Marion and written/directed by Jonathan Levine (who made one of the best films of 2011 with “50/50” as well as the critically adored “All the Girls Love Mandy Lane”), “Warm Bodies” is a sweetly funny and touching riff on “Beauty and the Beast” or “Romeo & Juliet” – if the Beast feasted on flesh or Romeo came back from the dead.