Just as I've previously done in 2008, 2009, and 2010, I would once again like to offer up a challenge in honour of the holiday for anyone reading this...
Comment here with a topic, any topic, and I will write a limerick about it for you.
In the past, I've come up with limericks on subjects as diverse as the Canadarm, Fruit Roll-Ups, and Postcolonial Theory, so don't hesitate to get creative.
Please keep it to one topic per comment--though you can comment more than once, and there's no deadline for submitting a request. As such, feel free to drop back in whenever you're in the mood for a limerick. :)
If you don't have a LiveJournal account or other means of logging in, please let me know how you got here, and make sure to sign your "Anonymous" comment(s) before submission.
I know I can be notoriously slow at replying to comments sometimes, but as with previous editions of this challenge, I'll do my best to be as prompt as possible on this.