Such an interesting question, those quotes about a fat shield led me to this psych article, Wearing Your Weight as Armour:
https://psychcentral.com/blog/archi...eight-as-armor/

Which has links to other resources...possibly you will find something in those. The sexual abuse/ unwanted attention is an issue that is rarely discussed yet has a high prevalence according to these specialists.

And this article in Oprah has a few suggestions for books about overcoming a negative body image which appear more geared to general image issues, not just sexual.