Same thing with my son. He moved in with me after my husband died a year ago, and loves it cold. I moved upstairs to the playroom to get away from the cold and just open up the sliding glass door and use a fan. I like the heat. :)
80F. The last three days (prior to today) were extremely hot with brutal sun and the air-conditioner was on all day. We kept the thermostat at 76. Today is not as warm so we turned it up to 80 to not run the air-conditioner.