The triolet is a tight little form, with enough repeating lines that, once you write a good couplet, the rest of the poem is not too far off.
Triolet (TREE-uh-lit, -lay) noun:
A poem or stanza of eight lines, having a rhyme scheme ABaAabAB, in
which the first, fourth, and seventh lines are the same, and second
is the same as the eighth line.
Here's an interesting link. And here is my lame attempt:
Can’t Swim, Can’t Whistle, Can’t Dance
Can’t swim. Can’t whistle. Can’t dance.
Obviously, we were meant for each other,
though anyone can see we both wear pants
and can’t swim, can’t whistle, can’t dance.
Such things should not be left to chance.
Who’d’ve guessed we’d be happiest with a lover
who can’t swim, can’t whistle, can’t dance?
Obviously, we were meant for each other.