Sex and Relationships Education for Young People and Adults with Intellectual Disabilities and Autism provides practical guidance for professionals working with, and parents or carers of, people with co-occurring autism and intellectual disabilities, on how to deliver and adapt sex and relationships education. People with autism have specific characteristics which can make interpersonal relationships challenging. When this is combined with intellectual disabilities it can make responding to these challenges even more difficult. While positive experiences can enhance quality of life considerably, negative experiences can be life damaging.