In this short series of interviews from 1972, people on the street in Ireland are stopped and asked, "What Is Pornography?" My favorite part in the video is when a young man gets flustered by the question and says, "I couldn't tell ya," as he cracks a shy smile. An elderly woman standing next to him chimes in and says, "Ask me."
The interviewer chuckles and asks the woman, "What is pornography?" She thinks for a second and then answers: "Photographs." I'd be curious to see a comparison video of this same question asked to people on the street today.