The adorable video was posted online by a mother who found her child’s hilarious reaction when she sneezed. The mother is the first person a child meets in life, and she plays a huge role in shaping the unborn child. Babies are so cute and innocent that they can’t tell fake from real, and the kid in this video also thinks his mom is sneezing when she’s just pretending. You can see how the baby laughs heartily as soon as the mother imitates a sneeze.

Fake sneezing is one of the preferred methods used to induce a chuckle or two off puffy, slobbery baby cheeks. It works every time, but why do kids laugh at fake sneezes? I asked some behavioral health experts to find out.