It's Patently Offensive.
FCC Page on OBSCENE AND INDECENT BROADCASTS:
Another interesting page detailing the FCC's recent Enforcement Actions:
And this from a college radio station page:
The standard applied is a national standard based upon what the
Commission at any given time believes will offend the "average"
broadcast listener. Because the standard does not look to local values
or sensibilities, it is discernible primarily through rulings as to what
the Commission finds offensive.
Examples of its findings include popular
songs which contain repeated references to sex or sexual organs ("Penis
Envy," "Walk with an Erection," "Erotic City," "Jet Boy, Jet Girl,"
"Makin' Bacon"); DJ banter concerning tabloid sex scandals (Vanessa
Williams' photographs in Penthouse and a honeymooner whose testicle was
caught in a hot tub drain); discussions between DJs and callers
concerning intimate sexual questions ("What makes your hiney parts
tingle?" "What's the grossest thing you ever put in your mouth?"); dirty
jokes or puns ("Liberace was great on the piano but sucked on the
organ."); non-clinical references to gay, lesbian, or oral sex,
masturbation, sodomy, erections, orgasms, etc.; and the seven dirty
words (shit, fuck, piss, cunt, cocksucker, motherfucker, tits).