He wasn ' t always that way . <| sep |> Along with the thermal conductivity , your body wants to vent some of the heat it produces . Hide under a blanket in an 80 degree room and you ' ll sweat terribly because your environment doesn ' t have anywhere to sink the heat you ' re putting off . Air at 6872 % is what we have grown accustomed to as a perfect equilibrium for how much we want to vent without venting too much . 80 % will be slightly warm , because is slows how much we release . That means we hold on to more and feel warmer , but are comfortable . Water transfers heat very well and very readily . So , the 80 % sinks heat very rapidly . It pulls more heat more quickly than we are used to , so we feel cold . <| sep |> Fuck coca cola for making me trust these beasts .