The sudden intrusion causes Izaya to flinch a bit, he being taken aback by such a transparent breach of his personal space. Pulling away seemed almost impossible as the fingers not only moisten but also adamantly keep his head in place.

So he sits still. His face relaxes, no longer contorting in anger. He begins to follow along with Delic's fingers and traces his tongue along their bony structures. It isn't sloppy or noisy, and that combined with his rather astute hearing allows him to take note of the wooden shuffle caused by Psyche to one of his sides. His hand grasps at the blond's wrist, loosely, pulling at it to move out just enough to have one fleshy tip rest on his canine. His lips make the motion to suck softly, one might think, but inside clamps down firmly on the soft-hard finger. It reddens, but is one millimeter away from not bleeding.

"But I can nibble, right?"