Maybe from about the age of about 14-21 a fit guy with a shirt off might be considered attractive to a female. But if you don't fall into that category put your damn shirt on when you run. Nobody wants to see your gut hanging out, man boobs and hair like you are chewbacca. It is a freeking eyesore and you look like a goof. Think about other people that have to look at you instead of your own selfishness.
signed,
Humanity