"Usually I don't explain him," Bella admits. "Insofar as he admits explanation, he's self-explanatory if you watch him be himself for long enough. Although maybe I'm biased because I can read his mind. Seriously, bet you twenty asters if you walk up to him and say 'want to try my favorite method for generating pentagons? If I can keep half I'll show you how' he says something that translates as 'yes ma'am please'."