Five-line XKCD ekphrasis
If thou wishest to wish on a genieThen watch out! you should not be so keenyFor the thing which first sightCalls a lamp or a lightMay behave when it's rubbed like a peenie
Evidently I went for a baser retelling :P
This one was ripe for a good, bawdy limerick. I'm glad someone was up to the job!