Crap????
Isn't that what you find when you put your head in the sand??...or is it what you find when you put your head in that 'other place'??
You've bought into the political definition, and response to the political definition, who have also put financial and agenda driven pressure on these 'studies'...but then you willfully ignore some of the 'findings', that poke holes in their 'studies'!.....and some of their 'findings' come right out of their 'studies'.....and they happen to coincide with what I'm saying, known psychological facts....and they contradict what they were 'hoping' to find, to bolster the agenda, that originally funded them!!
I'm ready to post a good link into the nature of receptors....but you don't seem too receptive....in other words BLOCKED!

GfS