Long ago in another library far, far away . . .
OK, only several years ago and an hour away . . . I swore I was going to compile a list of all the humorous, insane, non-PC, and otherwise entertaining book titles that I came across handling hundreds of books every day in Circulation and Reserves. Unfortunately, I never did so which means some real doozies have escaped from the steel jaws of my sieve-like mind. 
But today when I was checking a call no. for uniqueness before assigning it to the book in hand I found this lovely gem, complete with exquisitely humorous LCSHs, too:
Ethics of spying: a reader for the intelligence professional.
- Spies–Professional ethics
- Espionage–Moral and ethical aspects
These are not the order of the headings in the record, nor is it all of them. It is just the order in which I find them the most humorous. The others are just derivative or simply not funny:
- Espionage, American–Moral and ethical aspects
- Intelligence service–blah, blah (x2)
- Political ethics–United States
- Military interrogation–United States–Moral and ethical aspects
See what I mean? Those last two not so funny.
Nonetheless, thanks to recent additions, such as Dildos and Strap-on sex (both of which may be subdivided Geographically) [see Jessamyn and Thingology], and now stumbling across Spies–Professional ethics, LC is certainly making life far more interesting.
Hehehe. Jessamyn makes a funny about “authorities” and strap-on sex in her post title. I think one could do the same with Dildos and Strap-on sex and Thingology. You blew it, Tim. Oops, wrong metaphor perhaps. 
Personally, I can’t wait to be able to use this new one from the same list:
Period (Punctuation) [May Subd Geog]
6 responses so far ↓
1 Irvin // Oct 29, 2007 at 9:17 pm
There was a book mentioned on Boing Boing the other day titled ‘Cooking with Pooh’ (as in Winnie the–).
And someone posted on their blog recently a MARC record with the LC heading ‘French letters’. (I don’t know if that has the double meaning in the US it has in the UK and Aust.)
I’m not touching the strap-on issue. (Take that in whichever way you like… um, I mean … I think I’m starting to channel a Carry On movie
)
2 Irvin // Oct 29, 2007 at 9:31 pm
Here’s the link to that first one. ‘Possibly the worst cookbook title ever’:
http://www.boingboing.net/2007/10/24/disneys-coprophilic.html
3 Jenn Miller // Oct 30, 2007 at 7:35 am
Yeah, but still no headings for vibrators. Go figure, the first round of sex-device subject headings went to the phallic substitutes….
4 Mark // Oct 30, 2007 at 8:02 am
Um, need to check the Authorities, dearest. Vibrators has been a heading since at least 2002.
Vibrators (Massage)
I know, I know. You want something more explicit, but check the 670s.
And what you’re trying to tell me is that all those phallic-shaped vibrators are only bought by men?
5 Laura // Nov 20, 2007 at 3:36 pm
I’ve just started puzzling over Pigs–Fiction and Swine–Fiction. There’s some overlap between the two, but some things show up as just one or just the other, which seems odd to me, but then I’m not a cataloger. But I do love subject headings.
6 Mark // Nov 25, 2007 at 2:13 pm
Hi Laura. Yeah, the whole pigs vs. swine thing.
I think the failure of overlap is due to LCSH for Children vs. regular LCSH. Cause, you know, ALL grown folks know that pigs are really swine.
Thus, most things for kids won’t get swine assigned, while most things for adults won’t get pigs assigned. Not saying the difference is justified in the first place, just that this is the way it is.
Speaking of lack of discrimination, turns out there is no LCSH for hills. One has to use mountains for both. While the authority record clearly points out that the terms are variable based on location, it also gives some definitional differences between hills and mountains. [The authorities are timing out and not letting me go get the reference right now.]
LCSH is a constant source of amusement and/or frustration. Often at the same time.