Randa Haddadin, an artist in Dubai, doesn't always use a paper sketchbook. Her legs will do just as well. On her Instagram page, you can see her flowing, ethereal line drawings of women and cityscapes.
They may look like tattoos, but aren't at all permanent. The ephemeral nature of her body art inspires her to be bolder in her work, as she explains to My Modern Met:
It’s a therapeutic process for me, where I don’t need to worry about the end result—keeping it, preserving it, or selling it. Instead, I can focus on the process of creating and enjoy the spontaneous strokes. The comfort of its temporariness gives me more room to be braver with my lines, unlike a permanent tattoo or a sealed oil painting.