Temperature is not an issue. This freezing thing is urban legend. As other commentors have said, it's TUC (Time of Useful Consciousness). You'll be unconscious without Oxygen very soon. So put the O2 mask on when it drops. The pilots will be diving for 10,000 ft. If you pass out due to lack of O2, you'll likely wake up again later. Just a little free sleep, that's all. It's like a few free beers. The O2 generators for the passenger masks last about 10 minutes, and are only there to get you down to a safe altitude. The chemical O2 generators are about the size of a tennis ball and make a touch of smoke when they operate. (Don't worry, the pilots have a "REAL" O2 bottle that will last for hours, it's the size of a golf bag).
When that Hawaiin 737 skin peeled off and flew with passengers directly exposed to 400 mph sub-freezing air...no one froze. I challenge anyone to find a credible instance of a passenger freezing to death in the last 50 years. It's myth. Oxygen is important, you can do something about that by grabbing the mask and using it. Temperature is not important. You can't do anything about it anyway.

If you are thrown into -60 C atmosphere at 40,000 ft, you've already been dead for a moment or two from the explosion. Minute fragments of your body might freeze in the fall to earth, but don't worry about it. It won't be painful by that point, and your freeze-dried morsels will be recycled in the ocean environment. Al Gore would be proud of you.

Now, as for cabin temp controls, FA's in their 50's often ask for cooler temperatures than younger FAs. Could it be menopause? Just Sayin...I think most female FAs would agree with that statement...I know my wife would.

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