User blog comment:MeDeoPal/On the Origin of Titans and Shifters/@comment-75.129.56.202-20141214034837

I think you're absolutely right. What I also think is that When titans eat people, they bring it back to a person who gives the dead people ( because most titans look like some one who has been killed by titans) the stuff they give them brings them back to life and turns them into titans. But that's just a guess.