Limericks and LIMERICKS.
Limerick expert Don Marquis identified three types of limericks: "limericks to be told when ladies are present; limericks to be told when ladies are absent but clergymen are present; and LIMERICKS."
A look at memorable limericks, each with five lines and an aabba rhyme scheme, clearly shows their intended audiences, as well as the bawdiness, nonsense, humor, and delightful storytelling simplicity of the form.
There was an Old Man of Nantucket
There was a young lady of Lucca
There was a Young Lady whose chin
Few thought he was even a starter;
There once was a man from Peru
A bather whose clothing was strewed
There once was a young lady named bright
There was an old man with a beard