Submitted by David1192 t3_10inpk1 in explainlikeimfive
Remarkable-Owl2034 t1_j5fbyux wrote
Babies smile, laugh and cry without being taught. It seems likely that these reactions are inborn and universal.
LeviathanGank t1_j5gicij wrote
yup my baby laughs when having fun but also laughs like a mad man when we laugh, i think its both natural and copy mechanics..
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