Healthy Respect easy to understand information on masturbation
https://www.healthyrespect.co.uk/etu/all-about-sex/masturbation/
Planet Puberty: masturbation section
https://www.planetpuberty.org.au/feeling-good/masturbation/masturbation/
Choices Support Supported Loving Toolkit: masturbation section
https://www.choicesupport.org.uk/about-us/what-we-do/supported-loving/supported-loving-toolkit/masturbation
About Masturbation for People with Intellectual Disability- For Males and Females
https://www.fpnsw.org.au/aboutmasturbation
Masturbation, Autism and Learning Disabilities: A Guide for Parents and Professionals - Melanie Gadd
https://www.amazon.co.uk/Masturbation-Autism-Learning-Disabilities-Professionals/dp/1787755614/ref=sr_1_16?crid=1YKJEZNP0TJRM&dib=eyJ2IjoiMSJ9.8P-NTfwWW3EoRnXT2OsOmUQ-ZR1t1IQ49sqGHDRbG835D9u2JUahfjiiKU5S7FMv44UnEZxJzI9dOzueAlM5kaSrkTF5qEoKEbp3kss_lSEWwZfyLs0990BVJ39PGu7q0HoJ9_xaoHHrBxSfqFUL8O3qvLCc01_vgkU-vmDZlkDw8D0VLdnFDHu3SFDTRS7QX10x6QlJkDtA5v6YDH-LlVL5SHIwIYtO4eWAH1Ub5Ec.xBq4MpXFn-8CbaOQWNoQCiAvGdyF6JcNKC_vBSgHVf0&dib_tag=se&keywords=learning+disability+books&qid=1739793465&sprefix=learning+disability%2Caps%2C86&sr=8-16