I dont know if either of you notices these interesting trivia facts regarding the 13 of Super Junior (from various sources), and so I decide to post my thoughtful analysis to share for all of you who support the only13 members.
If you realize, this is the original order of Suju members based on their birthdays (here, I used Siwon’s real birthday):
Leeteuk–Heechul–Hankyung–Yesung–Kangin–Shindong–Sungmin–Eunhyuk–Siwon–Donghae–Ryewook–Kibum–Kyuhyun.
Now, I will reveal my logic of why this order and 13 made a really good sense (at least for me), and I guess this will be another good reference for all Suju fans out there who like Suju’s pairings.I paired up members starting from the each side, the oldest with the youngest, respectively, along with their coincidences/similarities.

