Oh, the library is full of hookers. Mostly they don’t actually ply their trade in the building, though.
(For a while we had a small problem in the 900’s. Had to step up security patrols. The thing is, it’s not an old building full of musty corridors or anything - you’d think they’d want something a little more private? And to not get a blowjob in the middle of books on the Holocaust?)
612 is way sexier.
I worked in a public library for about two years when I was first finding my feet in academics again and needed extra income – every single day we had an issue with someone beating off back in the stacks, flashing the high school girls who came to do their study hall with us, all sorts of creepy shit.
I think every university library has one ‘special’ set of toilets for hookups; the University of Delaware’s was a gents’ on the 3rd floor. Woe betide the undergrad who didn’t realise this, especially if he went for a late-evening wee, because apparently several students were approached/assaulted because they didn’t realise the particular status of this toilet block.
When I was at UVa, there was a creepy stairwell in the newer part of the library that had a lot of grafitti on the wall: each were a cryptic message with a call number, and then when you went to that book, there would be phone numbers and requests for kinky hook-ups. This was back in the 1980s, so dunno if any of that is still there now (Alderman, for any bored and/or curious wahoos). All of the books were in the Es and Fs, which is US history (domestic) and US history (foreign relations).
Back in the 1980s, huh? I was a grad student at UVa in the mid-1980s, but the math department had its own library, so there was no reason to go to Alderman. Never knew what I was missing.
So now the Dewey Decimal System has replaced the handkerchief code.
The Dewey Decimal System was first published in the 1870’s. Just sayin’…
So now it’s the “Do Me” decimal system.
I was in grad school for history from 1988 through to 1996 (although lived away from campus from 92 or so to write my dissertation). I so totally do not miss the humanities libraries (Alderman and Clemens) at all* – Alderman was awful in those days, no climate control, books mouldering on the shelves…so conducive to clandestine rendez-vous! 
*Or UVa full stop, come to that.
You know what’s hilarious is that we have to keep the Sports Illustrated swimsuit issue in the drawer and we lose all sorts of expensive art books, and we had a guy who spent all day taking pictures on his phone of ladies’ razor ads? Leg man, I guess? Anyway, I’ve been reading a ton of books lately on birth and infant care and there are so many naked boobs in them and I don’t think our patrons know it! Should I tell them?
Seriously, it is nipple city up there in the 649s!
(I know what you’re thinking - those aren’t sexy nipples. Trust me. They do not care.)
30 post around the Library and nobody has said, “Ssshhhhh!” 
I would imagine they were probably of the French or Greek variety.
I motion that from now on, libraries be governed as their own jurisdiction. While inside a library, everything is legal - so long as all activity remains below a certain decibel measurement.
As a bio undergrad, my advisor gave me the Dewey decimal number of a book and a page number. I went to the bio library and found the book. It was a massive tome on mammalian milk. Charts, graphs, breakdowns, of every milk ever studied from mouse to whale.
I turned to the page number and found a photo plate of a cute young lady feeding an orphaned newborn fawn. I freaked out, it was totally unexpected and unwarranted.
ETA: yes, she was breastfeeding the fawn.
So much duckface it hurts.
“I never nursed a dear gazelle,
To glad me with its soft black eye,
But when it came to know me well,
And love me, it was sure to die!”
Well then amend my previous post to read the “Do me decibel system.”
I’m shocked your patrons aren’t that inventive … my husband’s middle school students figured out ages ago that while actual sex sites were blocked on the school’s computers, plastic surgery sites were not … it’s all boobies all the time on some of those.
I only remember foot guys from my university library - guys that would actually go under the tables and try to touch/lick women’s feet. Oddly enough when I first started working for another university in another state, we had a foot guy for awhile there too. I don’t think he ever got caught, but he stopped coming back.
I don’t know what it is with foot guys and libraries - we had one at the university library I worked in in grad school too. I haven’t encountered one in awhile but my coworker at a branch has a notorious one who gets the new librarians sometimes with “oh there’s something on your shoe…” hoping they’ll take a shoe off and he’ll get a look at those sweet, sweet piggies.
Fun Fact: Library attendance is at an all time high in recent years.
Huh, so maybe that was what Solomon was talking about. I’d wondered about that.