Your fantasies are probably too optimistic. I can guarantee you that real dead girls won't be as pretty and fuckable as you imagine. It could work but in very rare cases. Like when a really pretty 18 year old died suddenly in a way that didn't destroy her body, was contained properly, buried quickly and you open the grave very soon after the burial (during the first night). Reality is often very different from our imagination. Life isn't a cartoon or a video game. Better don't ever try it. It is extremely inappropriate and the penalty would be harsh. Your life would be completely ruined if you were caught.