Searching for Kinky Kids, a Japanese boy band since 2000s, would trigger a warning about sexualization of children.
If you insist on searching for "kinky kids" (using quotes) you will find stuff that is closer to what the filter warns you about, still SFW though.
https://www.theguardian.com/education/2014/may/21/kinki-univ...
Turn out it is the correct spell that triggers the warning