Nudist casual

"May?" One of the dinner guests asked, blushing furiously as she averted her eyes. "Why are you naked?"

"Oh, that? I'm naked because..." May stammered as she tried to think of something, looking between the three women and two men that were her guests. Without thinking, she blurted out, "It's the dress code!"

"The... dress code?" One of the men asked, still stunned as his glasses fogged up.

"... Yes! The dress code that I forgot to put on the invites. It's... It's Nudist Casual!" May lied, desperately praying that her guests would buy this as she gave a sheepish smile...