I am currently south from where I normally live and it's noticeably colder. Have done now a few days of cold showers in the evening and only wearing light clothes in the cool. A bit of shivering now and then, but not too bad. I also sleep with only a thin cover, so nights are a bit cool with some sleep interruption, although I still think that I get a decent sleep. Ovall not too painful ...
I will only be able to do that for two weeks, then it's back to the tropics and sweating. Cold showers up there are impossible, the water is at best body warm. And I don't have a bath, so no ice baths either. Might think about buying a big tub where I can soak at least my upper body in ice water.
Thought I would give this a try just to see what happens in these two weeks. If I am lucky I might get some leptin sensitivity back (or maybe not).
BTW, my BMI at the moment is 26.6 ...