Whoever invented the phrase, "I slept like a baby," never had kids.

https://lemmy.ca/post/62480278

Whoever invented the phrase, "I slept like a baby," never had kids. - Lemmy.ca

Lemmy

Maybe it originally meant a long sleep
Babies don’t sleep long though…
I think they do. You could also interpret the time spent in a cot as sleeping, but just very restless sleeping.