Ciel was happy to be demon. We'll as happy as you could be eating souls for an eternity. Of course, he had much to learn.
Sebastian was going to teach him about making contracts next, then eating souls and...well, there was a long list, but Ciel didn't really want to go through it all.
Sebastian had already been rambling on about something along the lines of an animal form. Ciel remembered Sebastian had come to him as a crow. He was pretty sure Claude had come to Alois Trancy as a spider, but all his memories of that had became quite fuzzy.
"...and you must also-" Sebastian was interrupted by the young Earl.
"Hey, Sebastian?" Ciel began curiously, "do all demons wear heels?"
Sebastian eyes widened for a nanosecond, but he than regained his cool, "What makes you ask such a preposterous question, my lord."
"Well, you wear heels," Ciel started, "and I never saw Claude's true form, or mine."
"I thought I asked you not to look at me while in my true form." Sebastian recalled.
Ciel scratched his head, "Well, while you were defeating Angela/Ash, a bug flew on my face. I opened my eyes to see where it was so I could swat it, eventually to its demise, t out of the corner of my eye, I saw heels. You had already defeated him...her...it, so I figured it was yours."
Sebastian swallowed, "It is simply part of my demonic killing state. It does not matter."
Ciel frowned, "But you never answered my question. Do all demons wear heels?"
"No." Sebastian answered with a vein throbbing on his forehead, "Now may we continue with the lesson?"
"One last question." Ciel added, "Do-"
"Bocchan, I really do believe that if you'd like to be a proper demon I should finish my lesson."
"And I believe that since you are contracted to me you should answer my question." Ciel humphed.
"Yes, my lord." He answered slightly annoyed.
"Did you choose to wear the heels?" He questioned.
"Are you sure you don't want to return to the lesson?" Sebastian asked in a last attempt.
"Did you choose to wear them?" Ciel asked more forcefully.
"...Yes. Are we done yet?" Sebastian replied.
In response the young heir burst into laughter. "W-W..." he tried to start but his words only turned into more laughter. When he regained his composure, he had something to say: "Why?"
"I became a demon at a very young age." He began, "At the time I was upset that my older sisters wouldn't let me try on their shoes. Are we done now?"
Ciel continued laughing, "I suppose so. Continue with the lesson."
A/N: I've always wondered why Sebby had heels, so my mind made this stuff. My first Kuroshitsuji fic, so be nice. I hope this was at least mostly accurate. Buh-bye.