By studying the interactions between babies and their mothers, researchers determined that babies’ smiles are strategic but not spontaneous. Specifically, babies smile in hopes others will smile at them, and they time it in a manner of sophisticated timing. In the study, researchers have found that mothers want interactions, while babies just want to be smiled at. Researchers studied the interactions between babies and their mothers. They found that babies’ smiles are strategic but not spontaneous. Specifically, babies smile at sophisticated timing because they hope others will smile at them. In the study, researchers have found that mothers want interactions, while babies just want to be smiled at. The baby monkeys with mannequin mothers also were more likely to suffer from despair. Scientists suspect that lack of bonding in human babies can cause similar problems.