User blog comment:Theory of everything/Grimm Speculations Part Two: Evolution and Transformation/@comment-41.160.213.42-20120608191212

Hey.

I just want to know how does the wesen know that he is a grimm. I mean they see his reaction and all when they change but how to they know. If a wesen changed infront of another wesen they will also have a reaction. Do a wesen have to change to his other form when another one changes infront of him? I don't know if Im making my point. My guess is that a wesen can smell one another. Pleasse help!

Thanks.