Happens to me too. "Sexo tube", which is a pure adult key, returns in google.es the first result YouTube
Check this result on same page. Google is out of any sense lately:
Amateur bestiality porn
wap.baidu.com/...tube.../tc?...FreeBeastiality%2525252CZoo%2525252CBizarreT ube...
cenas de sexo explicito zoofilia cavalos fodendo mulher somente exibir gratis. Tag: cavalos cenas exibir explicito fodendo gratis mulher sexo somente zoofilia. free zoophilia porn. Tag: free porn zoophilia. yazoo city high school alunmi. Tag: alunmi city high school yazoo. Tag: milf zoo. sexo tube video zoo. Tag: sexo tube ...
As you can see, it found sexo tube in tags, so it decided to give a fair place in top 10. Not to mention the title. OMFG
On same page, Google Books:
Crea tu proyecto Tube - Google Books Result
https://books.google.ro/books?isbn=8483565498
Roger Cusa - 2011 - Business & Economics
... contar la vida a diario de su familia desde el punto de vistadesu mujer con el videoblog Katilette,yel desushijos en Shaytards. El objetivo eracrear vídeos más relevantesparalos diferentes perfiles de su audiencia: hombres, mujeres y niños. Es decir,que extendió el show teniendo en cuenta el sexo y la edad de sus fans.
Only keyword "sexo" is present, but no keyword "tube". And it's Google Books...for real? WTF are the engineers are Google smoking?!?
Can anyone enlighten me too of wtf is Google doing? (it's already so for couple of months). Here is the top 10:
https://imgur.com/a/ZaTi6