You know, what is really interesting about Psilocin, DMT, LSD, LSA and a few other substances? They more or less resemble 5-HT, Serotonin, a neurotransmitter or rather THE neurotransmitter. Maybe, just maybe, those substances can replace Serotonin in the body, but react just a little different. So the transmission of information in the brain is changed in whatever way. As I read, just 10% of what we perceive is actually sensual information, the other 90% is... well, imagination based on genetically inherited information, experience, etc. Remember the american natives that couldn't see the big spanish ships at the horizon until they stood right before them? They couldn't imagine them, so they couldn't perceive them. When the function of Serotonin is partially replaced by another substance, it might be possible, that the 90% part is somehow different. We perceive the "same" world, but it's interpretation is different, sometimes A LOT different. A reversion of this theory would result in: We are normally tripping on Serotonin and life is actually a 5-HT trip.