fun fact #7: the human body starts to melt at a relatively cool temperature over what you'd expect; in temperatures around 60-65C (140-149F) DNA begins to break apart, subcutaneous (under the skin) fat begins to separate and thus melt. Add another 40C (104F) and due to the the force of dipole attraction in water being too weak to withstand boiling point temperatures, water molecules in the body will start to come apart. And the human body is about 60% water. Unfortunately for all you budding serial killers, bones don't melt and muscle, the actual skin layer and all that burns before it melts, so you'd need a temperature of 1600C (2912F) to seriously melt someone.
also i'm totally aware that nearly everyone on this site doesn't want to know how to melt the human body so here's some foxes