Laugh and the world laughs with you - and so will your baby. At least that’s what a recent study out of Japan found:

Breastfed babies with eczema experienced milder symptoms if their mothers laughed hours before feeding them, according to a study by Hajime Kimata at the Moriguchi-Keijinkai Hospital in Osaka, Japan.
…
Kimata also found significantly higher levels of melatonin in the laughing mothers’ milk. The hormone is associated with relaxation, and levels are reduced in people with eczema.