"Of course you can," Arad stared at Eris, his eyes glowing with a purple haze, "But be careful, you might burn,"
Eris giggled, approached him, and gently stroked his chest, reaching toward his neck, "I do like spicy food," Extending her tongue forward, she licked Arad's neck, slowly pushing her fangs into his flesh.
Vampire bites are similar to those of bats. Their droll holds an anticoagulant and a sedative. The victim won't even feel the touch of their lips, only the faint sensation of their blood rushing up to the wound.
Arad closed his eyes, trying to feel his blood, but he couldn't. No matter how much she sucks out of him, it will never be a drop in the massive pool of blood that his draconic body holds.
I should write something about dragon and vampire anatomy, and most monsters.