One night in 2023, Eric was scrolling on a social media channel he regularly browsed for porn. Seconds into a video, he froze. He realised the couple he was watching - entering the room, setting down their bags, and later, having sex - was himself and his girlfriend. Three weeks earlier, they had spent the night in a hotel in Shenzhen, southern China, unaware that they were not alone. Their most intimate moments had been captured by a camera hidden in their hotel room, and the footage made