It's equally likely that alkaloids like psilocybin are insect or bird repellents or mere metabolic byproducts, and that the fact they sort of slot into the 5-HT

It's equally likely that alkaloids like psilocybin are insect or bird repellents or mere metabolic byproducts, and that the fact they sort of slot into the 5-HT2A receptor in the brains of some species, wreaking havoc on various processing systems there, is a mere coincidence.