I've heard of athletes who can make themselves feel cold/heat on command, or make themselves sweat on command, etc. I wonder how you can do that. My old coach told me that when he was an athlete he would light a candle & concentrate on it for hours on end, and then when he finished he said it felt like only 10mins. I remember he said something about the mind's eye. I guess if you had a dirty mind you could do other stuff too. I wonder if there are any books, sites, etc that could send me in the right direction?