I think you have explained that very well even for a idiot like me, could I just ask does it make any difference if you add the milk before or after you pour the tea?There is a set amount of energy in the universe, limitless energy has to displace energy from somewhere else.. does it not? everything in the universe is breaking down unless it's maintained, like a cup of tea will go cold as the energy disperses.
Someone with a bigger brain could explain this better than me.