As we reported early today (Thursday, October 4) Sinead O’Connor decided to post an open letter, offering advice to Miley Cyrus. You can check that out here. Now, after Cyrus mocked O’Connor’s concerned appeal, O’Connor has posted a second open letter. All we can say is: oh… dear. Read the letter below. “Miley… Really? Who the fuck is advising you? Because taking me on is even more fuckin’ stupid than behaving like a prostitute and calling it feminism. You have posted today tweets of mine which are two years old, which were posted by me when I was unwell and seeking…