Capsaicin-Textile
Fascinating.
There are stories of cowboys putting chile pepper powder into their socks to warm the feet.
China has taken that idea a step further:
You can find clothes like this, with capsaicin worked into the textile in order to get a warming effect…
So, female underwear that, for once, is cute and yet meant to get the wearer hot, not the onlooker.
The uses to which chile peppers can be put 