No spoilers (and there will be a lot of nice surprises), but Ray is not just an AirBNB host. He is a friend that kindly let you stay in his awesome room in his awesome (and cool!) flat located very close to everything in Munich. He knew that you were never to Munich, and he helped you finding fun things to do in Munich. He is a traveller himself; believe him!
I will definitely come back here when I visit Munich again!