If you ever want to feel self conscious, go ahead and arrive somewhere important after having trekked through the heat in your gray shirt.
There's nothing like arriving to your job in a shirt that is no longer the same color because of all of your body sweat. You gotta love taking a seat in class wondering how gross people think those stains on your shirt are. Walking seemed like such a good idea! Lesson learned.
Find yourself some air conditioning and don't move for about 15-20 minutes. Your visible sweat stains might just go away, leaving you wondering if that dry sweat is emitting the terrible odor you've begun to smell everywhere.
It's just slightly annoying.