A selfish desire. An interesting way to put it. Selfish isn't quite the word he'd have used to describe that instinct, but it's interesting that Wrathion has.

Anduin lets his hand drop from Wrathion, sits back and studies him curiously.

"... When I last saw you in this form, you were a lot smaller."

He can't quite contain that thought anymore. Wrathion used to be the size of a housecat, perhaps. Now he's -- well. Now he's a more intimidating dragon. Anduin can feel his heart racing when he lets his mind longer on the thought too much, on the sharp teeth and talons very close to him.