http://www.plime.com/plime-com/en-ushttp://www.plime.com/plime-com/http://www.plime.com/entertainment/l/46133/1/http://www.plime.com/entertainment/l/46812/1/http://www.plime.com/arts/l/65420/1/
They have been an integral part of graffiti in the last 40 years, and since the first graffiti - thousands of years ago.]]>http://www.plime.com/plime-com/l/63990/1/http://www.plime.com/plime-com/l/3853/1/http://www.plime.com/plime-com/l/51741/1/http://www.plime.com/entertainment/l/61405/1/http://www.plime.com/world/l/59587/1/http://www.plime.com/entertainment/l/52052/1/
By the good folks at Cracked. As always, I loled.]]>http://www.plime.com/plime-com/l/28142/1/NSFW]]>http://www.plime.com/entertainment/l/32708/1/http://www.plime.com/arts/l/27105/1/http://www.plime.com/plime-com/l/4406/1/http://www.plime.com/arts/l/74920/1/http://www.plime.com/entertainment/l/10533/1/http://www.plime.com/technology/l/38069/1/http://www.plime.com/plime-com/l/28419/1/http://www.plime.com/arts/l/7982/1/
Here's a guy who dissects them. See if anyone looks familiar.]]>http://www.plime.com/plime-com/l/18190/1/http://www.plime.com/plime-com/l/10916/1/