This is why i call Dowoon, Fluffball.

Dowoon really a bundle of joy!
Jae really adore him alot! Look at how he look at Dowoon and stroke his head with love Jae.. i also want to stroke Fluffball's head

Here.. Jae explain why Fluffball is Fluffball
Also, Dowoon claimed himself that he think he is pure

There is nothing more pure than Fluffball's soft voice calling for his big brother~