My ramblings on McDanno in 5x17:
Danny really wants to improve Steve’s and his relationship, he reads up on Steve’s personality in the workbook, wants to do the homework. He realizes he cannot answer all the questions in the book about Steve and asks Steve what he is passionate about.
Steve feels threatened by the whole emotion-thing and wants to shut it all down before he might get hurt.
He observes and is surprised how Danny really wants alle the help he can get to understand him better. It gets him thinking. When he knows Danny is not looking he starts to read in the book. Also he might have been a little hurt that Danny says Steve is passionate about protein.
Steve realizes, that he is keeping Danny out by not explaining his inner thinkings and makes a huge step forward by telling Danny the guitar story.
A step that he explains is not easy for him, we might concur that he has never done this before.
Danny is surprised and happy that Steve actually took this step. He knows he can’t rub it in if he wants Steve to continue on this way. But he thinks about this the whole time after the stake-out and buys him the guitar to 1) show him he appreciates the honesty and 2) help Steve further connect with his feelings. And with him.
Also: Danny’s insomnia is cannon - he could not sleep in 5x16 with Amber next to him after having had a wild night (we all know that). Danny says he has insomnia when he tells Steve he recognizes the infomercial voice.
And what do we get? A sleeping Danny on the couch next to Steve! During a stake-out while neither is supposed to sleep. Danny who is so much by the book that he normally would not pull such a stunt. Steve who knows about the insomnia lets Danny sleep. Do I have to spell it out?
Steve brings Danny the peace that nobody else can, not even Amber (and sex).
Okay, I demand a guitar-playing Steve with an attentive Danny who smiles at him all the time. When Steve is finished he smiles his goofy face at Danny.