The images you're talking about were mostly involving different scenes of domestic life. These scenes present different possible things that people did at the time at home, in the sense what was available. There were also depictions of of women often in their images.
To make their art more realistic and in turn, more valuable
A lekythos (plural lekythoi) is a type of Ancient Greek vessel used for storing oil (Greek λήκυθος), especially olive oil. It has a narrow body and one handle attached to the neck of the vessel, and is thus a narrow type of jug, with no pouring lip; the oinochoe is more like a modern jug.
