Which anime has the best yuri kisses?

I know about Prisma Illya and Sakura Trick, but could there actually be something out there with better yuri kisses/fanservice? I have to research this for science. http://ift.tt/1Evgjwz

I recently started watching Hyouka

I must say, I am very impressed by it. The characters, the atmosphere, the mysteries, the suspense, it's all masterfully executed. I finished episode 5 just now Spoiler. I hope it keeps me interested throughout. http://ift.tt/1NyBUGZ