Dexter's all "What the hell?" and Arthur explains, perfectly honestly, that he lost his sister when he was very young, and it was especially painful for him. Dexter, honest in spite of himself, says he can understand; he's lost people too. Arthur sits him down to tend to his hand, and Dex asks why he keeps the urn out, if it's so painful. "Because she's a part of me, Kyle," Arthur answers. "Makes me who I am." And how! But what if his family saw him flip out like that? "They'd understand," Arthur says. "This is my home. I can be myself here." Okay, now Dexter might just squeal "Jealous!" out loud. Arthur says he used to be secretive -- even lost a relationship over it (wonder if that fine lady will factor into the season somehow?) -- but he met Sally and realized he had to jump in with both feet. Both bloody feet. 'That saved your family?" Dexter asks. Arthur stresses to "Kyle" that his family saved him. Then Dexter rushes out to purchase a Dictaphone, because he's got some notes to take.
Before Dexter heads home, Arthur tells him to hold up. He places his murderin' hammer into a bag of tools and hands them to Dexter. A gift, "for the next build." Arthur sends him on his way, until the next build.
Back at therapy, Dexter has taken the lessons from the murdering psychopath to heart. He wants to jump in with both feet, he wants to let Rita in, but he doesn't know how. "I never learned," he says. This whole scene is fairly fascinating, because it's Dexter being as honest as he can, maybe as he's ever been with Rita. And yet still, he's got things he needs to hold back. So is this Dexter being "honest" with Rita? Or is this Dexter just getting better at lying while seeming to tell the truth? Rita says she understands, given his past. She reveals to the doctor that Dexter's mother was murdered in front of him. Whether Dr. Roma Maffia does or does not make the "ka-ching!" cash register motion with her arm, I can't say. But I can say Dexter looks fairly freaked out to have that information just linger out there for anyone to see. He admits that it shaped who he is today. But he wants to change. (Again, this feels true...to a point.)
Dr. Roma Maffia asks Dexter if he feels afraid to get close to Rita. Dexter: "Yes." Because of his past. "Are you afraid she'll abandon you?" she asks him. Dexter: "Yes." This bracing honesty lands with Rita. "If she ever sees me for who I am..." Dexter begins. Rita is incredulous that Dexter thinks she would leave him. "Absolutely," he says. Rita says she married him because she wants to know the real him. Hmmm. One would hope the marriage vows would come after one feels they know who their prospective spouse really is, but okay.