joshm: he hasn't chosen 'my way or the highway' did you read his post? Snakes go to cooler sides and warmer hides to MAINTAIN a CORE temperature. namely between 80-84 degrees. because his ENTIRE room is that temperature, they don't have to try to maintain anything, the core temp that they look for is already what they have. when they go to the hot side, they may get up to 90 degrees, so they go to the cool side but maybe they stay too long and get to 80 degrees, so back to the warm hide. etc etc. Ken is giving them the temp they are trying to achieve.
did you even read what he said?
If toast always lands butter-side down, and cats always land on their feet, what happens if you strap toast on the back of a cat and drop it?"