Ah, fifty isn't too bad, though. That's where I keep my thermostat in the winter. I would go lower, but it won't. I consider the house heated if I don't have a ring of ice in the toilet when I take my morning ****.
After these past few years working in the freezer, I don't take the heat so well, though. I have to keep it below 80 in the summer or I'll melt.