Actually, it is! You can generate heat by physical activity or intense thinking, and you can lower it by sleeping but also through calming yourself and breath control. There’ve been studies about monks who have learned to do this, but anyone can do it through enough practice (or you could just work out or sleep, those are the easy ways).
Thats not a thing … probably
Edit~ glad I added probably
Actually, it is! You can generate heat by physical activity or intense thinking, and you can lower it by sleeping but also through calming yourself and breath control. There’ve been studies about monks who have learned to do this, but anyone can do it through enough practice (or you could just work out or sleep, those are the easy ways).
https://news.harvard.edu/gazette/story/2002/04/meditation-changes-temperatures/
Bio-regulation is a thing but not like what OP is hinting at.
I wouldn’t have believed it if I hadn’t witnessed her do it yesterday and felt her body temperature change. I didn’t know people were capable of that.