Monika used to collect candy wrappers as a child. She loves sweets, so together with a friend she began to collect papers. And that led her to eating only (or mostly) wrapped candies.
For the shoot I brought a number of different candies and asked her to eat them while I was shooting. It was as simple as that! She told it was the best photoshoot in her life because she could eat as many sweets as she likes.