Okay, so lets go with case law.
United KingdomSexual penetration of a corpse was made illegal under the Sexual Offences Act 2003, carrying a maximum sentence of two years' imprisonment. Prior to 2003, necrophilia was not illegal; however, exposing a naked corpse in public was classed as a public nuisance (R v. Clark  15 Cox 171).
Seems it was made an offence in 2003...
Firstly my ex-wife was often rather unenthusiastic about sex.
Since then I have noted that quite a lot the younger women I end up with have rather disturbing issues that lead them to shout ”choke me daddy” at the vital moment.
So if it goes too far:
Is it murder?
Death by sexual misadventure?
Necrophila if I don‘t stop? (See above about sexual partners not responding too much).
I have alot of questions - not least to ask of the younger ladies I tend to hook up with.