Apparently some pedophiles like spanking children. I came across some that have an onion forum for it. I even found some Russian guy asking in a public vk post for images from them: https://archive.today/https://vk.com/wall501760301_2

A little later, I coincidentally came across this cracked article, and it mentioned the site as well.
https://archive.today/20200913221449/https://www.cracked.com/personal-experiences-1760-5-things-i-learned-infiltrating-deep-web-child-molesters.html

That's where pic related is from.