Why is it that perennial hackers and software developers are perceived to always dress odd and down? Most hackers and developers I know of dress to what they fe

Why is it that perennial hackers and software developers are perceived to always dress odd and down? Most hackers and developers I know of dress to what they feel comfortable especially with a long coding day ahead. Besides the point, most hackers are quite bigger in size, so having models in your site with nicely sculpted bodies quite takes the programmer/hacker out of the equation.