Usmiech zebiczny (1957)

A man walks down the exterior staircase of building of flats; he's dressed to go out, taking care to wrap a scarf around his neck. He pauses as he passes a small window that's about eye high. He ventures to look in, and there a young woman stands at a washbasin, drying her hair, the towel that obscures her face her only covering. The peeping tom gets an eyeful and smiles; he's interrupted by a door opening, the flat's occupant bringing out empty bottles to place on the porch. The man pretends to leave, departing down the stairs, only to return to the window after the flat's door has closed. He again looks in the window, where a surprise awaits.