Board Thread:Questions and Answers/@comment-29752445-20170414021931/@comment-1327106-20170414031506

I think it's a fair assumption, but it's probably it just an assumption. I have Chapter 57 in front of me because of other edits I've working on, and when I read the conversation Hange talks about Ymir being trapped in a nightmare and eventually eating one of Reiner's companions. Hange concludes: "In other words, if a human who has been turned into a titan eats a human who can transform into a titan, they turn back into a human.  Or to be more precise, they gain their ability to control their titan transformation."

Then Hange goes on to speculate that this is why Reiner was willing to throw titans at Eren, because if Eren's scream ability can be transferred, it's not Eren who's important, but the ability he's carrying.

If there's a subconscious drive to seek out humans, it's not in that chapter or it may have been in a non-Kodansha translation.