Most of us don't equate the Dewey Decimal system with sex (and I'd prefer not to hear from those who do). But if you're looking for action at your local library, slap one of these on your lower back and bend over to browse the X-Z card catalog. You may be surprised.

Batgirl was a librarian, you know. I don't know if she'd have tattoos, but it's worth saying. Best delivered as a bookmark in a copy of Library Lil.