when I trained in body therapy, there was a product specially for people with weight problems with peppermint oil in.
it tricked the area it was applied to into thinking it was cold and a shiver reaction happened which aided in burning fat (so to speak), it was a fabrication of the senses, not an actual cooling.
I know someone who finds the sound of flowing water, a babbling brook or waterfall very stressful since they nearly drowned, it would seam that sounds are only relaxing or conductive if you provide that worth to the sound.
He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them.
But if he is equally unable to refute the reasons on the opposite side, if he does not so much as know what they are, he has no ground for preferring either opinion …
He must be able to hear them from persons who actually believe them … he must know them in their most plausible and persuasive form.