In a 1996 special of German news-magazine "Der Spiegel" there's a column about Alan Abbott, who participated in Marilyn Monroes funeral. He's cited to have told a story about a "young male" who bought a hearse from Abbott, only to dig up his dead lover, transport him home and proceed to have "bodily love".
Here's my translation of the interesting section:
The embalming preserved the object of his lust, and sex with the dead is not punishable in California.
Is that true? Was there a time after 1957 where necrophilia was not punishable or even legal?