It was a reference to your gender. If I were calling you human I would have said as much.

[He lazily opens his eyes to look down at him, blue shining through long blond lashes.]

You are a vampire, my love. I know this and adore this. But let us not talk about such things or my mood will grow sour and all your work will be for nothing. I desire to be spoiled by you rather than upset with you.