this is intricately linked with 'queer'
this is a book aimed at NHS doctors
https://www.amazon.co.uk/Sexuality-Gender-Mental-Health-Professionals/dp/085702843X
it is written by a transsexual doctor who works for the NHS gender service, and Meg John Barker, who is an Open University lecturer who writes books like 'Understanding Your Gender' and 'Life Isn't Binary'
The book which you can 'Search Inside' says that doctors should not judge these fetishes as they are perfectly ok and a safe way for people who were sexually abused to explore sex