well warm is an interesting term. you would think that when something is too warm, it would be considered HOT, but actually in certain cicumstances, when something is too hot, it can become WARM. but the warmer you make something, it doesn't necessarily mean it gets any hotter.
warm is what you take something bright and make it more mellow without making it dark. but if you add warmth to mud, then you just end up with shit. and if you end up with your shit too HOT, then it's almost impossible to polish it, and it just becomes a mess.