What I would say to an alien coming down to Earth, in a letter?

  Dear Alien,                                                                                                                                               I realize this will be your first time on Planet Earth. We hope you come in peace, for we are welcoming you in open arms. What it is like to live on Planet Earth is absolutely astonishing. It is truly indescribable what you will experience down here. There is grief, anger, bitterness, nervousness, sadness, etc. However there is happiness, gladness, relief, and much more. These sensations are what you call feelings or emotions. Additionally, there is so much food here it is impossible not to eat. ( If you are in the right side of Earth, of course.) Entertainment is a big factor to our society. You can watch movies, comedy stand ups, we'll explain when you arrive. I hope you need not to feel threatened at all.