Cold nights in the desert

I has been getting down into the 40's at night over the last few weeks but is still nice and warm during the day here. I thought it was a little chilly in the house at night but nothing a sweater couldn't fix. The stinky boys disagreed and this is stinky boy #2's way of telling me that it is too cold in the house and we need to turn on the heat. I caved in and turned it.