John doesn't instantly clock what is bothering Ianto, because it's a big old pool and the Khali are small green fairies. He moves to the waters edge without comment and shrugs off his bag, drops it to the ground and reaches out to test the temperature.

Which is about the time a few Khali flit up to him.

"Hi!" he begins conversationally, slowly becoming aware of how undressed they are and... actually how undressed everyone in the area is. "Nice place you've got," he adds, "I was just admiring this pool."

He glances back and around to try and pinpoint Ianto, for both moral support and also help carefully navigating a conversation with naked tinkerbells.