The one on which a social network used by nearly 3 billion people worldwide (Facebook) bans pictures of centuries old world famous paintings containing naked wo

The one on which a social network used by nearly 3 billion people worldwide (Facebook) bans pictures of centuries old world famous paintings containing naked women, as if it were pornography. The one on which a video hosting platform used by over 2 billion people (YouTube) rates content as 18+ as soon as it, even briefly, shows a pair of breasts. Why? Which planet do you live on?