"So long as it doesn't end in me getting hurt, you can examine me as closely as you'd like," Astarion said, that tone of his bordering on sultry- further reinforced by the slight smile on his face.

Bringing the knife back to his hand, he pressed it down against his skin hard enough to break it so that he would start bleeding again and held his hand in a way that would make the blood pour into the vial- pulling the knife away once the vial was suitably filled so the small wound could close back up.

Setting the knife down, he pulled a handkerchief from his pocket so that he could clean off the blood- though he'd need soap and water to do so properly. It was still better than just leaving his hand wet and sticky with it though.