"It's sunscreen, Ianto, not torture."

Since this a very dramatic response to it. He rubs some over the back of his neck and along his shoulders, squinting down to make sure it's not coming out in big streaks before squirting more into his hands then gently under-arm throwing the bottle to Ianto.

"You're welcome, by the way."

For the sunscreen, the swimming (floating) lessons, the making sure you don't drown, the building you camp sites. You know.