well the song "Smile", the lyrics, if you look at it a kurofai sense, you can seee he's talking about kuro...
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Left behind in a distant land are many goodbyes
Inside my dream - hey, hold me, I'm broken
All these protected things, I want to carefully show you
Carried on the wind is only a song.. Yes, that's all.
This road is cruel,
But when you smile..
Because of your kindness, when I try to think
Of the painful times, from inside my heart
Come countless smiles.
it COULD be taht Fai is singing about how kuro should protect him and stuff ^_^ (heck, the first 2 lines describe fai PERFECTLY, the 3rd is a kurofai-kind of line)
Fai is just so lonely and so willing to have kurogane care that i feel totally broken for him
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he desperatly tries to lure his attention by teasing him,so it doesn't mean that he particulary like acting like a comical,but that he thinks that it is the only way to make kurogane react
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Kurogane told Fai that he hated him for always smiling stupidly,but Fai seemed to accept this state of mind because his aim was not really to obtain kurogane's love at first,but just to see his reflection through his eyes,like if he was so disgusted of himself that he was only satisfied himself when Kurogane dared to glance at him,because Fai was certainly feeling alive at this moment
!
i suppose that Fai certainly think that he doesn't deserve Kurogane's love,and this is why he puts himself recklessly in danger,because his life has no meaning if he isn't linked to anyone...but it is about to change of course