Google has updated its search ranking algorithm to "more strongly affect the sites that host explicit videos but don't allow Googlebot to fetch those video files" which may lead to a "significant drop in ranking" for some of these sites. Google also updated its SafeSearch documentation with new best practices and details.
Tldr the ai is now looking for tits n bits
Just like the rest of the visitors
the real turing test.
Googlebot sad when disallowed access to 18+ videos