Because they are small enough probably x3

Size and weight are a good indication of how healthy a new born is. And honestly, in terms of healthy-birthed newborns, there isn't much to talk about. They all sleep a lot, cry a lot, and poop a lot. Personality doesn't start to show for several months.

My theory: Size/weight is the only thing they really have to talk about

"He has his grandfather's eyes."

"Gomez! Take those out of his mouth!"

+1 movie reference to you sir