I mean, it's certainly useful to be able to raise your body temperature. I've done a bit of biofeedback and can raise my hand temperature by about 15°F in a few

I mean, it's certainly useful to be able to raise your body temperature. I've done a bit of biofeedback and can raise my hand temperature by about 15°F in a few minutes, although not if it's really cold out. I assume if I practiced more, it could actually be a survival skill.