Strangely enough, the blade was one he'd made so the pain it brought was interesting to Korbin. It meant it was done right and almost made him proud for a moment, as he stared at Astarion licking him. He didn't care about what the other was but it was fascinating to see in person. Vampires were things he only heard about before. Now he knew one.
He let Astarion enjoy himself but didn't think it would be wise to have too many new wounds, no matter how surface level they were. Korbin cupped his face with both hands and stared fondly. "I like your teeth," he admitted. "Feel free to bite. You seem hungry." He smirked and lowered his hands to undress them. Because he figure in a worst case scenario, he would just give Astarion a push to stop him if he got out of control, though he didn't expect it.