Okay, admittedly, all fairly good points. The heat isn't bothering John, particularly, but he's used to it anyway and... admittedly used to crisis situations too, but. Pretty good points.

"I don't have a hang up! I'm just invested in your happiness. Besides, if we're all going to die in dragon fire I'd take what I can get if I were you. Never know when it might be your last night in this place."

Not... wildly reassuring but you know. Realistic. He squints at Ianto after a moment, who is still frowning at him, and adds --

"You put sunblock on?"

Because if not, he is definitely going to burn.