He did, since that was the first present ever that Tobias made for him.  Harry has finally gone past the jealous stage, I think, since Sev & Alaina hvae been going out now for a year by the end of the chapter. I agree with the strangers lesson, it's a good thing to know and to review. 

As per the spanking, Severus can amend the number of spanks he gives when taking in the seriousness of the offense, in this case, it was pretty damn serious--people could have died as a result of their "innocent" little prank.  Harry knows this, and he knows also that he deserved it.  Plus, I've stressed several times that it's not really the spanking itself that makes Harry cry so much--yes it hurts, but it stings, Severus does not leave marks, and it stops hurting after ten minutes--Harry really gets upset because of Sev's disappointment and anger with him, and it hurts more than the actual spanking.   That's why the first question out of Harry's mouth when it's all over is "Are you still mad at me?"  And yes, that is the reason Harry  can talk about it to Lexy, it was just, done and over with, and he wasn't traumatized by it.  Abuse, like Lexy's, on the other hand, is never justified, scares the child to bits because there IS no reason for it, and hurts way more than necessary because the abuser is out of control.  Another reason why Sev does not punish Harry the same night of the prank, because he knows he's still too angry and might lose it and truly hurt him.