פירוש על עבודה זרה 121:6

If the wine were in the public domain, we can assume that the non-Jew would not drink it. If the house has a window, then people can see in. If there is a rubbish-heap then people could stand on it and peer into the person’s house (I know this is strange). They might also be able to see in when they climb up a date-palm.