Well, because he's pretty much a trouble maker.  If he's unsupervised...he will eat the couch & everything else.
Honestly...his crate is in the other room & always left with the door open.  It's funny....but sometimes when he gets tired...thats where he goes automatically.
Maybe when he gets a little older...but for now...it seems he just likes wrecking everything.  Thats why as much as I can...I talk him for walks, to the park, throw a ball outside, etc....  Even when I do that...he still wants more.  I will have to say...he's slowly getting better as he's getting older.  He's just got too much silly boy in him right now.