Rhea'li's brain stutters to a halt at those words. "...Preference?"

His hand flys up to his mouth to hide what must be an excited grin and his quickness of breath. Crowley isn't exactly his type (Crowley doesn't look like he could crush his head between his thighs, for example) but with the possibility that he's a shape changer...

(How is it that he knows so many who can do that?)

His hand falls away from his face after he regains his (normally unflappable) composure. He tries but fails to not sound too eager, "You can change your form?"