There are many, many terms in English that include hot or cold in them. I will give a small sample of such terms:
Hot
- hot job
- hot fix
- hot offer
- warm regards
Cold
- cold calls
- cold emails
- cold hearted
- cold blooded
English is spoken in hot as well as cold regions of the world, and there are native English-speaking people in both the northern and southern hemispheres (the United States, Canada, Europe, Australia, New Zealand, South Africa).
So why then is hot considered something positive and cold considered something negative, and when did this first start happening in the English Language?