I think that he has not harmed anyone.
Since when someone dies, the person disappear, is no longer feels or suffers. The body becomes a lifeless thing, like a stone
It may not be "right morally", but until recently it was wrong for two men to kiss or black people was a "lower race". And in many places it still is.
I have read this news in several sources and I think is wrong to me, that they had in prision, when there are thieves, rapists and murderers free on the streets
If he had sex with corpses, Nothing bad will happen, nothing changed. No pain, no hurt, no traumas... because the "victim" is dead. It will be buried/burned anyway