The assumption that primal phantasmatic activity stems from bodily functions is widely accepted in developmental and psychoanalytic thinking. This article attempts to give more specific meaning to this abstract assumption. It examines the influence of sensory, perceptual, and motor capacities on the consolidation of typically differentiated erotogenic experiences relevant to pre-Oedipal and Oedipal organisations. It then proceeds to examine the impact of innate deficiencies in these capacities on the development of phantasmatic organisation in children on the autistic spectrum who often manifest atypical erotogenic organisation. Additionally, it pays attention to non-symbolic therapeutic communication and the unconscious transference-countertransference relationship stemming from such a problematic matrix. The paper is clinically derived from a description of the early-Oedipal organisation of a child with low cognitive and functional capacities and proceeds to the manifestations of the Oedipal constellation of a high-functioning autistic child.