hot to cold or hot to hot????

Personally, hot drinks make me feel hotter and cold drinks make me cooler. I drink coffee every morning and when spring/summer comes around, I have to add milk solely for the purpose of cooling it down a bit. I live in east Texas (weather has gotten hot already)and I have eliminated one of the cups I drink altogether in the morning and cool down the other with milk. Drinking coffee at this time of year makes me sweat and feel terribly hot. I guess I should just switch my morning caffeine to a cold diet soda. It doesn't make me sweat lol. I think it was in a movie that said that it wasn't healthy to drink too cold of water when exercising hard (they were training/football). I don't know if that was accurate or not about the temperature versus exercise.