The context of the picture is simply a cracked mint. It's nothing special to look at, really—that is, until you read the caption. The reason I find it funny is that the person who wrote the caption is creatively thinking left of center and is undoubtedly wittier than most people. Because I don't think most people would have come up with that caption. This type of creative thinking is original—albeit, in a dry sense of humor style—but the caption changes the entire perspective in a funny way and the viewer now looks at the picture differently.
