Hey Guys And Gals, Here is my 100% Achievement Guide & Full Walkthrough for Wailing Heights!
This is a while into act 2 and there are only 3 to find.
The first one is when you play as Soul Ghoulman and need to go the interrogation room in the police station.
After you question the zombie on everything, go out and talk to the Minotaur behind the desk and choose this specific dialogue option. "The zombie isn't cracking, better turn up the heat". The Minotaur will go away for a few seconds, and when he returns, MAKE SURE to talk to him again and ask him "Hey, do you know any good limericks" He will say something and thats the first one done.
The second one is the receptionist in Town Hall. Again, As Soul Ghoulman, just go and talk to her, exhaust all dialogue options and asking her if she knows a limerick is part of those options. She says something like "It is forbidden" or something similar.
The third and final one is when you finally get to take control of Fangs (The vampire in the coffee shop type thing singing on stage). Once taken over, immediately head up the stairs behind you and talk to the girl sitting infront of the mirror. She says something and the achievement will unlock here.
Go to 1:02:25 for Limerick 1, 1:06:50 for Limerick 2, & 1:13:25 in my video to see who. how and where these unlock.
Hope This Helps!