What I love about Harry is he, after forgetting everything, just shows this raw, unfiltered desire to connect with people.
He was probably different a few days ago, but he's got this longing in him. He could be one of the people that are less likely to express it. He was lonely, and this is the chance for him to forget how he was trapped in his cell and step out.
Now he wants to observe, wants to ask questions--for the case or not, wants to hug and wants to help people. A lot times these behaviors are considered odd or funny, but they also indeed reached people. Cause in the end humans all have this longing, it just becomes too complicated. And Harry just has his way of sweeping that all away.