"I'm just saying, you'd do better to fix that now before you go on a long walk in this sun and wind up with little patches that rub."

He turns Ianto's head with a light touch to his jaw, rubbing in some sunblock that's caught in his hair and frowning in concentration.

"If you're going to come fight a dragon with me we can't have you starting the fight burned up already."

That's just too much of a disadvantage when they already have plenty. Be sensible, Ianto. Nobody wants sunburn and nobody wants to have to look after someone with sunburn.