What a bizarre claim to make, that he can't sweat was it? Obviously not true, he was in the military I think, even as a helicopter pilot he wouldn't be able to serve if he couldn't sweat. You wouldn't be able to live without sweating first time you get some exercize you would get brain damage, or first trip to the subtropics, from the heat. Your balls would get fried too.
Guy obviously can sweat if he couldn't he would be like a bubble boy.