Frankly I think this was the straw that broke the camel's back and what made his mom black list him. This "I can't sweat." lie is not supported by science... it's not even a credible lie. It would be like a child insisting that aliens came down in a space ship and stole the cookies from the cookie jar. Literally no one believes him and the Queen knows it. That is the precise moment he became a too much of a public embarrassment to the royal family.