firstly - it’s the natural scent for attraction.
secondly - shows that you’ve been working hard or working out, people, who do that have ambition and great strength.
second and a half - also sweat from dancing or being sexy is cool.
final - just sweating shows that you are a healthy person, your body is working, it’s part of the bodily water cycle.
addition - i‘ve heard that stress sweat is stinky