<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why do adults say they “slept like a baby” when babies wake up every few hours?
<|assistant|>
This is an idiomatic expression which refers to someone sleeping very deeply and peacefully. It has no correlation to how often babies may wake up during the night. The phrase is used to indicate a particularly restful and peaceful slumber.