Druids do it under the mistletoe.
Paladins do it with a stick up their...
Clerics do it missionary style.
Rogues do it in the dark... from behind.
Fighters do it wearing protection.
Rangers do it in the woods. (I was about to make an animal ref here; maybe Orcs would scribe something so foul)
Wizards do it with their hands.
Sorcerers do it spontaneously.
Bards do it with their mouth.
Monks do it with all kinds of tricks.
On a more serious note, consider making a bathroom wall that acts like a divination spell. Once per week, a scrawling on the wall "comes true"; after following the wall's advice, someone finds a treasure, gets a bad guy arrested, saves a life, prevents a tragedy, whatever. This could be a constant source of side quests for your players when you want to change up your adventures, take a break from the plot, and so on.
"For a good time, call Tatiana at the King's Bazaar. Wear green."