Risorius is a muscle in your face,
a key to happiness and to grace,
It helps pull the angle of the mouth
to smile at jokes or sommat uncouth

situated in the space
twixt mouth corner and your jaw,
on the side of your sweet face
to produce grin or guffaw.

so when next you smile or deride,
though latter's to be used most sparing,
remember that muscle at your side,
and wonder at His creation unerring