☝️🤓 because if a zombie bite turns things into zombies, it can't turn zombies back with the venom inflicted upon the prey because the venom *only* turns things into zombies
If you passed science class you'd know that the temperatures want to reach the thermally equilibrium with the rest of the room. Say the room was 27 degrees celcius, over time, the water would heat up to 27 degrees, and the food would cool down to 27 degrees.