system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If the human body is made to regulate a temp of 98.6F (37C), why is that not the most comfortable temp?

It seems most people prefer an ambient temperature around 70F (21C), but logic would tell me it would be easiest to maintain our internal temperatures at 98.6F (37C). What am I missing?
gpt
Our body generates heat, and can only cool through ambient temperature. If the ambient temperature is equal to or higher than our regulated temperature, then how will it keep its temperature down?

Basically, if it is cooler, you can do a little exercise to warm yourself up. But if it is hot, what can you do to cool down?

So cooler than regulated temperature is more comfortable because your body is constantly keeping itself warm.