Why Don't Babies Talk Like Adults?

"This E*Trade commercial is only the latest proof of what comedians and movie directors have known for years: few things are as funny as a baby who talks like an adult ..."

Well, let's not carried away. It's cute in small dosages.

EDIT: Just came across this:

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"Why don't adults talk like babies?" would be a more insightful question in my opinion.

Because they're stupid babies.

My experience raising two children is that adults often talk to babies with babytalk. we talked to our babies with adult language and they didn't really use babytalk.

So, uh, practice makes perfect, and babies just haven't been around in the world long enough?

Market segmentation.