SCIENCE, BITCHES

https://www.ncbi.nlm.nih.gov/pubmed/26711672

( https://twin.sci-hub.tw/5550/762dc57698b77f4f4984fc381a087375/10.1111@jep.12508.pdf#view=FitH )

Maternal kisses are not effective in alleviating minor childhood injuries (boo-boos): a randomized, controlled and blinded study

The Study of Maternal and Child Kissing (SMACK) Working Group