Most women ( up to 80% according to Oprah Winfrey ) are wearing the wrong size bra.  This of course leads to discomfort all day long and affects your frame of mind and therefore how you interact with those around you, this can then affect your image and approval rating at your job.

The thing is, wearing the wrong size or shape bra will also cause you physical pain all over your upper body due to the constant strain.  So make sure you only wear perfectly fitting bras, don't buy a bra just because it is on sale, or you will pay for it dearly the entire time you own it.