In my youth, I worked at a roadside ice cream stand. Ugh - worst job ever, but strangely it didn't put me off ice cream! On the hottest days, we would be sweltering in the little non-air conditioned hut, and the freezers could barely keep the ice cream frozen. Except for any flavours with nuts. For some reason (perhaps the oils?), that stuff doesn't melt. Kind of like the McDonald's milkshake that never melts?