I have used the Lenna photo sample at times for decades, but never knew it was from Playboy. Other famous computer graphics icons include the Utah teapot and Stanford bunny. More recently there are standard sets of photo faces to train artificial intelligence algorithms to recognize faces and distinguish gender, age, race, sexual orientation, beauty, smoking history, alcohol and drug use. Some of the A.I. programs are now better than humans. Like the Lenna picture, some of these photo databases are scraped from social media without permission.