He hisses through his teeth. Yes, it hurts to be bitten. Suddenly this seems like not the best idea but then again it's still going well over all. His skin isn't that impenetrable it seems. Blood is drawn. Loki looks less than pleased but he did release the key into his mouth.

"Do not think you won't pay for that," Loki tells him as he looks over his fingers. He then seems randomly amused by something and jumps down. As soon as he hits the floor his hands go to Clint's pants where he starts to remove them.