Thick frames are great for anyone wanting to look "fun". About a decade ago, someone with thick frames was dorky. Today, with so much humor based in irony, someone who willingly puts them on sort of looks like they're making fun of themself. Or maybe they just don't care what anyone thinks!
If you're trying to make your wardrobe a bit more carefree, try getting some pharmacy glasses with thick frames. You won't forget it!