My wife and I are like this. When we first met, she called me at 5:30AM to see what was up. My question was &quot;Who died?&quot;<p>She&#x27;s a 9p-5a kind of gal. Left to my own devices, I&#x27;d sleep 1a-8:30a.<p>It has been an object of contention to us over the years, but we work it out. Having our son and adjusting to the sleep deprivation afterward helped.