Think about how many times you or a friend has said, "Does she own a mirror?" or "Doesn't she have a friend that would tell her ______". Wow, that sounds mean as I type it.. look for a 'I'm a mean person' post soon. But seriously...the girl who always wears way too much foundation or has that line of it around her face? The guy whose pants are always too short? The girl whose clothes are worn just a little too tight.. etc. and you think, "Why doesn't anyone tell them??".. Why? Because that can feel mean! Telling them something is wrong with how they look without them asking you probably isn't the nicest thing you could do.
So do yourself a favor, the next time you're questioning an outfit, your makeup, anything, ask your 'tell you the truth' friend, "does my _____ look OK?"