Apple has been busier making and selling iPhones of late than all of humanity has been at getting busy.

The company smashed most expectations yesterday when it announced its iPhone sales for the last three months of 2011 totaled over 37 million units, a figure that exceeds the number of babies born on planet earth--using the global average daily birth rate --during a comparable period (about 98 days).

Digital design guru Luke Wroblewski first noted on Twitter that Apple has been more productive than humanity has been reproductive in recent months.

There are more iPhones sold per day (402k) than people born in the World per day (300k). twitter.com/ !/asymco/stat...

— Luke Wroblewski (@lukew) January 24, 2012

While Wroblewski's numbers seem a bit off based on the Apple and Wolfram Alpha figures cited above, the conclusion remains the same--if iPhones ever start feeding on human flesh (what I call the "Digital Walking Dead" scenario), we're in trouble.

Yes, the notion of zombie iPhones is a silly idea, but with the emergence of Siri, Apple's intelligent and snarky assistant, combined with Apple's rapid growth and my habit of drinking too many energy drinks after dinner, it certainly made for some vivid nightmares last night.

The benefits of population control aside, perhaps it's time to make a new commitment, just in case iOS turns out to be SkyNet--no more iPhones in bed, people! Let's save that area for other... activities.