What's do alcoholics and necrophiliacs have in common. They both like opening a cold one.
Are you talking about having sex with dead people?
I'm just joking dude. I assume that you know that's a joke, right?
Sexual assault is damaging to a person and joking about it can trigger a person. Making light about it even by making fun of having sex with a dead person who cannot consent can be hurtful, just like you would be hurt if people made a joke about something that caused you pain.