system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: On the radio, why can the dj's say "pussy" (and not referring to a cat) but not "dick"?

Edit: This came up because on Bob and Tom this morning they had one of their characters call in and he always calls them pussies.  Then they were playing a comedy song and it kept bleeping out dick.
gpt
Long story short: The FCC is only effective if it's reported.  The FCC doesn't monitor every minute of every day for bad words, it will only investigate if it receives a complaint from a listener.

And it's also all in context.  Here are the FCC rules on indeceny:

* An average person, applying contemporary community standards, must find that the material, as a whole, appeals to the prurient interest;    

* The material must depict or describe, in a patently offensive way, sexual conduct specifically defined by applicable law;    

* The material, taken as a whole, must lack serious literary, artistic, political or scientific value.

**So in your specific case, pussy (not referring to a cat) could be considered an offensive, sexual description without serious artistic, political, etc value.   In all honesty, 'Dick' could be taken the same way.**
    
**Essentially, you CAN say anything on the radio, so it's really just a game of 'would someone report this?'**

[Legitimately, you can say anything you want between the hours of 10p and 6a.  Those are 'safe harbor' hours where the FCC doesn't give a toot.] 

So it's all a matter of opinion on what to say and not say on the radio, what the general public will or will not be offended by - or convinced to report.

On cable TV/Satellite radio, the FCC has absolutely no ruling on what goes over the air, since people are choosing to pay for that programming.  Generally, the thing stopping shows from cursing or showing flat-out porn is, "Will our advertisers still show commercials during this?"

Which is why South Park says anything and everything - they are at the point where their sponsors know what they're getting into and still buy time.

Addendum:
"He's being a Dick"  = okay.  Not sexually offensive. 

"He sucks Dick." = Sexually offensive.