The stance of the "person" at the window, together with the camera bag and hanging long lens, say to me: "Photographing," not "Peeing."
But I agree with Russ that the guy on the left is needed to balance the image.
And he adds ambiguity, because his presence suggests some relationship between the two of them, but we have no clue what it is.
And, as Russ has said before, ambiguity is often a good thing in a street photo (even if the street is several floors down).