He doesn't know how they got here, but she definitely started it. When he implied he wanted more romance novels, he meant the kind with the melodrama and the bad sex and Fabio on the cover. Cas doesn't look like Fabio.

"That so?" He has to sound skeptical because... well, he still is. He can't really deny that Cas is special, though. "And so it just happened for you two? Is it some kind of Florence Nightingale thing?"