As you already know SM goes all in when it comes to the looks. So I found a picture on Yunho yesterday (don't ask me how I found it -.-) and I think it was during TVXQ's debut days?
Well it was a smiling picture:

  

Damn that was a good dentist...
Look how freaking perfect, white and shiny his teeths are O__O
But I think that picture is from his trainee days.. don't you think so? He looked really young and chubby there.