Laughter is the fireworks of the soul.
Laughter is the sensation of feeling good all over and showing it principally in one place.
Morally considered, laughter is next to the Ten Commandments.
When you do laugh, open your mouth wide enough for the noise to get out without squealing, throw your head back as though you were going to be shaved, hold on to your false hair with both hands and then laugh till your soul gets thoroughly rested.