Believe the autistic person when he tells you how he is experiencing sensory input. However improbable, however vastly different from anything you might perceive this may be, it is absolutely clear that many autistic people process senses very different from the PNT.

The privilege of being oneself is a gift many take for granted, but for the autistic person, being allowed to be oneself is the greatest and rarest gift of all.

Source: Autism and Asperger Syndrome in Childhood: For parents and carers of the newly diagnosed