Saw similar idea in Gran Canaria recently - but they guy painted a black sun-proof paint every day over the same design on his body. Each night he washed it off to go out.
After several weeks sunbathing he had then had a tattoo in reverse i.e. a pale area amongst dark skin.
He had chosen a design like the baby Alien from the film stretched across his torso and round his neck.
Eye-catching and creepy !!