My old 2009 Mac Book Pro got hot enough in mid summer in the south of France to burn my legs, while using it wearing shorts. I have seen the CPU temperature up to over 80ºC when doing intensive Photoshop work or batch converting a large number of DNG/RAW images with Capture One to 16 bit TIFF's. My more recent 15" Retina MacBook Pro gets hot but never as hot as the older one.
One day hopefully apple will make a portable computer that stays at around 40 degrees +-, and the fan doesn't click on what ever the task, maybe Skylake and 16GB RAM is the answer?