Those brought up in the Catholic school system expect explicit dress-code warnings before the prom.

Grammy show attendees? Not so much.

CBS sent a wardrobe advisory this week, advising performers and audience members to cover all their bits -- including "bare fleshy under curves of the buttocks and buttock crack." Deadline.com published the network's memo after receiving it from an irked source who said, "I assume that my lovely colleagues to do not guet this same email for the Oscars."

Considering the parade of celebs who would make a list of fashion don'ts for other shows, the music award shows are the place where everyone expects to let it all hang out. J. Lo's cut-to-there-floral Versace gown at the 2000 Grammy Awards seems positively chaste compared to L'il Kim's pasties at the VMAs and Toni Braxton's bondage-inspired bathrobe dress.

Keeping the female form under wraps includes ditching "thong-type costumes," "adequately covering the genital region" and avoiding sheer fabric that "could possible expose female breast nipples."

No mention on men's breasts -- a la Trey Parker's homage to J. Lo's Versace gown at the 2000 Oscar Award ceremony -- but the dress code does point to men's fashion as well. Lapel pins are off limits.