[Bertie looks alarmed at that. What if an Aunt in a high dudgeon should come bursting in at the ungodly early hour of nine in the ack emma and discover one naked as Adam? Such a horror scarcely bears thinking about.]

If such is your preferred night clothes it's a good thing that you aren't in the habit--as Rocky is--of popping off to work or entertaining guests in the garb, or lack thereof, of sleep. It would be terribly awkward.