Here's a subtle alternative to the explicit nature of tattoos.

As the name suggests, Birthmark Tattoos, are fake - but permanent - birthmarks that you can add to your body. Aside from its decorative potential, birthmark tattoos makes it possible for your and your partner to 'exchange' birthmarks or to imprint your body with a secret message in braille.

Birthmarks Tattoo is a concept by Dutch designers Julia Müller, Arjan Groot and Menno Wittebrood who were commissioned by the magazine Identity Matters to come up with an idea for new ways of tattooing.

• Birthmarks Tattoo