Why would the amount of energy required to increase the temperature of a defined mass of water depend on the temperature? This goes against the idea of specific heat

(editing to add - I didn't realize that water's specific heat has a temperature dependence and changes around 5% over reasonable indoor temperatures

https://www.engineeringtoolbox.com/specific-heat-capacity-wa... )

I blessed to live in a country that uses kilowatts. That works wonderfully (and advertised as such) for AC units

Speaking personally, I have the "must be covered" gene along with the "overheats easily at night" gene, so it's been a bit of a struggle hitting a balance. Right now a thin breathable quilt is the way to go, even in deep winter. Hard to explain really, but I feel anxious (and cold!) if my body is exposed, even if it's actually pretty hot in the room.

The best mitigation for this conflict seems to be those knitted blankets with the enormous holes. Terrible heat retention, and they're pretty heavy. That got the job done during a Texas summer on more than one occasion.

Here in India, when I was growing up it was normal to sleep without a cover in the summer (no ACs back then, only ceiling fans and perhaps an evaporation cooler in more luxurious circumstances). I remember when a friend and his cousin from Thailand was visiting and the power had just gone out. The temperature was in the early 40s (Celsius) but the Thai cousin who wanted to take a nap insisted on a thin cotton sheet as a cover. My friend and I were confused and kept telling him it's not a good idea but he couldn't fall asleep without it.

As someone who lives in the Northeast US but travels to Florida somewhat regularly it amazes me how low people keep the AC. It’s common for people and places, or at least those I visit, to keep the AC lower than I keep my heat in the winter(18c). So sometimes I’m so cold I have to ask for additional blankets or bring a jacket to a place like a movie theater.

Yes, it is totally a thing. We don't have a lot of hot nights in Denmark but when we do, we still sleep under a duvet, or maybe half under one and it is just as awful as it sounds.

I'm born and raised in Sweden, now live in Spain, cannot fall asleep unless I have something covering me, but I can also not fall asleep while sweating... So in the hottest months (July and August), I tend to just use a bed sheet as the cover, does the trick.

It is a thing and not only in U.S. I live in Greece and my girlfriend can’t sleep if she’s not covered by something even if it’s in the middle of August and it’s scorching Earth outside. She says she feels vulnerable without a cover. I on the other hand can’t sleep with a cover during summer.

No, I often sleep on top of my bed during the hot summer days. I also don't put myself under the blankets when I take a nap.

I don't know what TFA is talking about.

In France some people do and some people don't but it's definitely a thing

It’s always 20C/68F in my apartment during the summer so I sleep with blankets. I keep it that cold to control humidity.

That would result in insanity for me. Is there any argument other than it seems like cave people must have?

I love weighted blankets but have to be careful that they're not "too" heavy. I used to have sleep paralysis relatively often as a kid and a too heavy weighted blanket often re-triggers this, which is obviously terrifying.

Weighted blankets are lovely if you have a neurodivergence that likes being enclosed (like me). But they are even more unbearable in hot weather

Not just bedding but clothing was costly. High quality bedding (as well as clothing) still costs quite a bit of money especially once you take into account you need 2 sets for rotation. A proper quality set will run you $1000-2500 and there's luxury brands which will cost much more.

This is a fascinating topic which was covered in-depth here: https://acoup.blog/2021/03/05/collections-clothing-how-did-t...

If I remember correctly, it claim is that about 50% of all labour over the course of history has gone into making textiles. More than food!

also consider the labor involved in upkeep. this is one of the rationales for nightwear: it's much easier to wash a change of nightclothes every so often than large sheets and blankets.

It is the only reason. I asked my wife one time why she sleeps under blankets when it's boiling hot (I do not); she said because there might be 'things in the night' so I asked if she thought these sheets will protect her; nope, but otherwise she doesn't sleep.

Its so the monsters can't see you.