 Mainwaring worries that he too might be transferred into the ARP, so he buys himself a wig, while Sergeant Wilson has acquired a corset (or "gentleman's abdominal support", as he calls it).They both try to hide it, but Mainwaring quickly figures out Wilson, who admits he's doing it not for vanity, but to stay with the unit.Mainwaring then shows off his wig, only for Wilson to start laughing uncontrollably.