Sure its weird to fuck dead people but perhaps its a way to beat rape charges. I mean the corpse isn't going to care if you fuck it or not. It's not going to call 911 and yet your ass arrested. Mind you, when you pull out you may have to deal with all of the maggots covering your cock and crawling over your balls. Then again with all that movement inside why pull out at all?.. 
It's horrible. From him will come the unpleasant smell of the dead
And if the corpse begins to decompose, then the slightest movement inside can lead to its destruction. I just wonder if this disease affects men or women, too, like sex with the dead?