"I still don't get it." Castiel cocks his head, looking like the RCA logo.

"I don't know how else to explain it to you," Sam says.

"But nudity is nothing to be ashamed of! Look." The angel waves his hand and the page on the laptop changes all by itself. "Michelangelo's David. A masterpiece. Nude."

Dean puts his head in his hands. "Could we please stop talking about naked people?"

"But . . . I find the human body beautiful. Don't you?"

"Only female bodies."

"But why?"

Dean sighs in frustration. "I am not freaking going through this again! It's just . . . different!"

"I fail to understand how."

Finally it hits him. "Cas, remember last week, when you found that story online, about us?"

"Yes."

"Remember we talked about that?"

It's like a light bulb goes on over the angel's head. "I see. So this is about sex."

Sam looks at them strangely. "What the hell were you reading?"