I naturally run hot, still only wearing t-shirts most of the time and last turned the heating on a few years ago when I lived in a converted church with a mix of single glazing and holes where the windows should be. Usually I survive other people's houses in winter with frequent trips to stand outside in just a t-shirt to cool down. Stuck in hospital tonight (planned stay, nothing serious) and I think they might actually manage to kill me with heatstroke.