I'm hot, she's cold

There is no happy medium, I'm hot, she's cold.   I turn the air conditioner on.  It is 80 degrees in here.  I can't breathe.  She has a sweater and a blanket on.   I am in shorts.  It's hot outside so there is no relief out there.  I tell her if she had some meat on her bones she wouldn't be so cold.  She laughs.  She tells me the same story every day about animals being destroyed.  I can't take that.  I live my life up, she lives her life down.  Every few days she likes to argue with me and make me feel guilty.  I remind her I am only thinking of her.  Of course this is the aging process and I know it well from working with the elderly for so many years.  Now I live it on a daily basis.  Just don't let me lose my scense of humor.  Please......