Big Bang member Taeyang (left) revealed that he has never seen fellow member Daesung use the restroom in all the time that they have been roommates.

On the taping of the SBS variety show, “Strong Heart,” Taeyang added that Daesung is very secretive about many things. In response, Daesung came back with, “There’s a reason for that” and didn’t elaborate.

So what’s the big secret? Perhaps he doesn’t need to use the bathroom? Maybe, he uses the public toliet instead or goes in the middle of the night?

Who cares… what we want to know is why does Taeyang care about Daesung’s potty habits?

The episode of “Strong Heart” with Daesung and Taeyang will air on January 5^th.