It was one thing to be insane, quite another to abandon all sense of proper decorum.

"One thing I do require in this place is proper decorum."

She'd worked hard at impressing the need for proper decorum upon him, and she was a bit relieved to find her efforts paying off.

"You certainly have to run the office of mayor with proper decorum and dignity."

Certainly, she had thrown herself headlong into his arms against all the rules of proper decorum.

I'm going to insist that there is a proper decorum around here.

In my absence the proper decorum will be maintained in this room.

So long as a proper decorum is maintained, I don't think we mind.

Is there no one in this house with a sense of proper decorum?

Clearly, proper decorum lay far from anyone's mind at the moment.