Ianto leaned into Sulu's hand in his hair, enjoying the feeling of the other man's touch, but then Sulu had to go and question whether his flat had central heating or not, and it set Ianto off laughing. "Central heating? In a flat like this in Grangetown?" he questioned, raising an eyebrow at the other man and chuckling, shaking his head. "I'm lucky I've even got radiators that even produce any heat whatsoever, really." He laughed again, and then smiled at Sulu, realizing that Sulu probably had no idea about radiators. He didn't now if they existed in Sulu's time, but he was willing to bet that they didn't, or if they did, then they probably worked the way that they were supposed to. "Radiators, they... They don't really distribute the heat all that much further than a couple feet away."

"No, it's alright," he said. "Unless we want it sweltering in here, there's really not much to do about the heating. Besides, it's my own personal heating system that needs to be turned up, not the flat. John suggested that maybe a hot bath might help, but..." He trailed off, shrugging.