Children whose species-specific, juvenile sexual rehearsal play is thwarted or traumatized are at risk for developing a compensatory paraphilia. The case of a Buddhist male exemplifies the cross-cultural application of this principle. His syndrome, formicophilia, was endogenously generated without reference to or influence by commercial pornography. The complete causal explanation of paraphilia will require both a phylogenetic (phylismic) and an ontogenetic (life-history) component. The treatment of paraphilia may combine an antiandrogenic hormone with sexological counseling.