I started the Kitteh :3 with Glammy (Glammeh) exactly like this, in the Dragonvale Chat, in a PM which was very annoying and mostly is caps.
I LUV KITTEH :3
I LUV KITTEH TOO :3
KITTEH PLAYS WITH YARN :3
KITTEH TAKES A NAP :3
Until we began to just say: KITTEH :3 back and forth.
One of us decided to mention how funneh our conversation in PM was in Main Chat by saying KITTEH :3 Fearful of getting kicked for caps, we changed it to Kitteh :3
It was originally Just Glammeh and I but now I'm honored to have had Kitteh :3 Spread to others! ^_^