Not stolen, but oil paintings with some sort of little heaters behind the canvas. Meant to be touched, warm to the touch — pictures of faces and of bodies.
Would the heat cause the oil paints to run? I don’t know, but if so, that wouldn’t necessarily be a bad thing. (Except for fumes, possibly, and fire hazards.)
Imagine seeing a picture of a woman’s face, crying. Imagine putting your hand on her face, feeling her warmth. It could be beautiful, disturbing, or both.