necrophily

But it is late: necrophily induces slumber; the old gentlemen have fallen asleep over their classics, and if what I am about to say takes a sanguine tone — and for my part I do not believe in poets dying; Keats, Shelley, Byron are alive here in this room in you and you and you — I can take comfort from the thought that my hoping will not disturb their snoring.

The Death of the Moth, and other essays 2002

It was so in this case of necrophily; he was the son of a weak-minded woman of unrestrainable sexual inclinations, and was himself somewhat feeble-minded; he was also, it is instructive to observe, anosmic.

Studies in the Psychology of Sex, Volume 5 Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in Pregnancy Havelock Ellis 1899

The earliest definite reference to necrophily is in Herodotus, who tells (bk. ii, ch. lxxxix) of an Egyptian who had connection with the corpse of a woman recently dead.

Studies in the Psychology of Sex, Volume 3 Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women Havelock Ellis 1899