BP's personal experience provides us with a unique report on the psychological and sensory alterations induced by hallucinogenic drugs, including an account of the absence of visual hallucinations, and a compelling look at the relationship between LSD induced synesthesia and crossmodal correspondences.
Similarities between mirror writing ability and synaesthesia are documented and it is further suggested that these similarities can be explained if the genes for each condition are regarded as target genes for the same mutated X-linked dominant transcriptional repressor gene, possibly MeCP2.