Robert A. Heinlein said this quote
“ I know where I came from—but where did all you zombies come from?I felt a headache coming on, but a headache powder is one thing I do not take. I did once—and you all went away.So I crawled into bed and whistled out the light.You aren’t really there at all. There isn’t anybody but me—Jane—here alone in the dark.I miss you dreadfully! ”