RiderFan, I bet you'll say something like that: "Two girl that kiss is not yuri because a boy and a girl can do it."
RiderFan, your yuri perception is so obtuse, even hardcore-lesbian-feminism-activists will find you obscure.
I facepalm at your ideology with all the force good sense can muster. Go to http://orz.4chan.org/u/imgboard.html On that board, you'll be happy to find more weirdos like you. I you ever become a mod, god help us all...