answered:
Apollo: Klavier has a summer house… Yeah, I know. A summer house. Rich people…
Klavier: A house I gladly share with you, my darling Herr Forehead. What’s mine it’s yours, after all~ The thing is… you don’t seem to love pools so much.
Apollo: Yeah, and you know why. But once in a while…
Apollo: …I trust you enough to spent some time in the water with you.