In limerick poems the 1st and last lines rhyme. Limerick poems are humorous too. They can be mean spirited too. Limericks all fun to read and write. Limericks can be about anything.
There was a Young Person of SmyrnaWhose grandmother threatened to burn her. But she seized on the cat,and said 'Granny, burn that!You incongruous old woman of Smyrna!'