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I remember a book in which the main protagonist is a human male and after witnessing alien activities he was forcibly whisked away. After being taken away he joins a type of galactic patrol type organization where one of his instructors/head instructor is described like an alien Big Bird.
Of the various scenes in the book, I remember the scene where the human man discovered the bird instructor literally "feeding the toilet". I also remember scenes with heavy drug use and scenes to make a sailor blush at least heavily implied if not described to some extent.
I read this book in middle school, so these scenes stick out the most in my memories. I have already checked and it is not a Steve Perry book. If I remember correctly, the one I read was paperback with a human male on the cover with a spaceship or space station behind him over a planet.
Could someone identify this book?