No, Cain couldn't see a thing. It was in the way his wide eyes were almost totally dilated, trying to absorb any light. All of the light was behind him, nothing in front. He was blind. Ben crept forward again, making no sound, wanting to be close enough for the mortal to brush against him. He didn't have to breathe, his body wouldn't betray him with sounds of life - heartbeats or gurgles. Only his mouth as he salivated, only the whisper of his hand upon his cock as he gently caressed fingertips along its base.
He moved forward again, seeing in Cain's mind that he wanted light, noticing that Cain was angling to the light switch. It felt and looked like the human was moving underwater. Ben was the shark, ready to bite. He moved forward, reaching close to the light switch just as Cain's fingertips got there, ready to turn it off an instant after it came on. He was grinning and he was right in front of Cain, his pet's breath had been held but was now being released just before the light switch flicked upward...
The light was on just long enough for Cain's eyes to focus on Ben, for his pupils to shrink rapidly at the bright light. It was like a flare going up in Ben's vision - a starburst - and then it was gone again because Ben flicked the light off, grabbing Cain's wrist because he hadn't reacted fast enough to pull away, and Ben tugged and pulled downward while moving away from where Cain was about to fall onto the carpeted floor - falling into darkness. He added a push to Cain's back for good measure because it looked like he was about to stumble in an attempt to keep his feet.
Cain landed mostly face down on the carpet but he turned instinctively, like prey trying to find out where its attacker was. Ben straddled him and crouched down, grabbing his wrists and forcing them either side of his head. Crotch to crotch now, Ben was spurred by the way Cain had cried out. His fear was enormous, like a thing alive all on its own, and Ben intended to feed it. Cain's racing heart was erotic.
He leant over to bite Cain's neck, not bothering to look for a vein, anywhere close enough would do because he wasn't going to drink. He bit and felt Cain's reaction in the flinch of his body - there was a moment where nothing happened, maybe Cain thought Ben would drink now - and then he pulled back, all the way back, removing his fangs but not healing the wounds, releasing Cain's wrists, getting up off him and stepping back, close to the wall.
Watching.