cold

As winter made its way into mid-Missouri last November, I zealously kept the thermostat at 65 degrees during the day, and turned it down to 60 at night.  I like a cool room for sleeping, and besides, propane is expensive.  
I kept that routine with diligence throughout December.  Then January brought sub-zero temperatures that wrapped around my house, seeped into my bones, and wouldn't leave.  I began to wander through the house with a blanket wrapped around my body.  The house seemed too cool at times, but I'd look at the thermostat, and it showed that the furnace was chugging along doing its job:  set at 65, it reaches 72 before shutting off, and lights off again at exactly 64.  So why did I feel so much colder than I had i December?  
As the bone-chilling cold lingered, I found myself nudging the thermostat upward to 68, then to 70.  I stopped turning it down before going to bed.  The heck with the cost of propane; we're on the level-pay plan anyway, and so far we're more that $500 ahead.  
That's what this winter is doing to me, turning me into a wimp.  The longer it goes on, the more heat I need.  
I'm so ashamed.