One of the reasons the white skeleton meditation works is because it teaches you to detach from your body. Buddhist monks in India used to practice this meditation method in cemetaries and charnal grounds – surrounded by rotting corpses all around them, so that they became better at learning how to detach from the body and surmount the sexual desire that arises from this practice due to all the chi coming up.

Still attached to you body? This google video of an autopsy may help you learn detachment:

Autopsy Video