How dirty is your mind?
Thanks to this optical illusion doing the rounds, there's an easy way to tell.
![Which did you see? Photo / Supplied](https://www.nzherald.co.nz/resizer/v2/UNH3IYQAEMCYABD6GITURZH4HE.jpg?auth=4993be4e225e33288ef1b7837465ef30ea67a014bf181730d96f150fdcdf083d&width=16&height=22&quality=70&smart=true)
The more worldly among us will see a naked couple engaged in an erotic embrace but children and other innocent-minded individuals will see dolphins - nine of them.
The incredible work, by artist Sandro del PreteWorld, is titled "Message d'Amour des Dauphins" and one of many optical illusions featured on his website Impossible World.