“Being happy has -huge- advantages. One, you smile more. Training of facial muscles. Automatic! But did you know that the risible muscle, the one that gets the biggest benefit, is part of the stomach muscles? Yes. Stomach training. Up and down.” TrainingSmileHappyStomachBeing HappyUp And DownBenefitSmile MoreMuscleAdvantagesAutomaticStomach MusclesStomach TrainingFacial MusclesRisible Muscle Book:Success, Love, Poetry. Source: Success, Love, Poetry.