hot coffee!! i went with my friend and his wife to the coffee shop. the coffee was brought when my friend's wife was in the wash room. it was steaming hot while the milk was cold.we mixed the coffee and milk and started drinking. (considering the fact that i prefer my coffee without milk, take this case as an exception.) now, i wanted to keep the coffee and milk mixed for his wife but my friend said it would be better to keep it separate till she came back as it would be hotter if it was mixed after she came than it were mixed right then. who is right?