He finds that occasionally sleeping beside her, his hand against her throat is sweeter torture than acidly drooling from her ceiling. The few times he has (accidentally) fallen asleep beside her he wakes with her gnawing on his shoulder; smiling in her sleep with her arm slung about his waist.

Her human teeth won't leave a mark, but he likes to retaliate anyway. She'll wake up with a scream, wrenching her arm from his grinning teeth. Confused and with blood blossoming on her sleeve she demands "what was that for?!"

He just smiles, dangerously, teasingly, playfully. "Love bites."