Understood, Good Night
Here, we see a text exchange between a woman and a man who doesn’t know the slightest thing about darkness. When the lights are off, your eyes will have difficulty seeing your surroundings, and it’s very much the same way for smartphone cameras. Sure, you could use the flash on your phone but at the risk of blinding yourself.
This man wanted nothing but a selfie from his dear SO, who politely informed him that it was dark. This didn’t deter the man in the slightest, so she took a selfie and sent it to him anyway. He really shouldn’t have expected anything except for a black screen, which was exactly what he got.