Never hard about necromancy was a fetish...., guess learn something every day... how does that work out for you? ;p
What
Duke Greene said.
For a more serious answer which is even
somewhat related to the original topic zombies and especially vampires are fairly common fantasy sex partners. Heck Harry Potter had a dude humiliate
DEATH HIMSELF by bringing back his lost love (yeah, how did that work out for you?) and Sally from A Nightmare Before Christmas can be absolutely
adorable. And of course you could use it in a lot of domination- or violation-related contexts, Praise Joko!
But I personally don't have a sexual fetish for necromancy itself. I'm just very curious about most "abnormal" or "fantastical" things including most of OP's list as long as it stays within a purely fictional context and undeath/easy revival is a convenient plot device to mitigate the harmful implications from other acts. It's not
actually murder by giant cock if she's already dead and keeps coming back for more right?