" Angela says that angel-bloods are supposed to be immune to cold. It helps with the flying at high altitudes, I guess." I shiver again. "I must not have gotten the memo."
He smiles. "Maybe that power only applies to mature angel-bloods."
"Hey, are you calling me immature?"
"Oh no," he says, his smile blossoming into a full-blown grin. "I wouldn't dare."
"Good. Because I'm not the one peeping into someone else's window. "

― Cynthia Hand , Hallowed (Unearthly, #2)