What is the total installs of apps with content rating of adults only 18+ and what are the translated reviews of it?
total installs = SUM(Installs);
SELECT SUM(T1.Installs), T2.Translated_Review FROM playstore AS T1 INNER JOIN user_reviews AS T2 ON T1.App = T2.App WHERE T1."Content Rating" = 'Adults only 18+'