Sometimes, a picture just speaks for itself. I feel like I could sit here and tell you all about a thousand reasons why the above example works so well, but the people who will love it will love it right away, and the people who don't get it, wont get it no matter what I say.
So rather, I will just tell you this is a piece of street art from London street artist JPS, and his work is some of the best and funniest stuff out there right now. While many street artists like Banksy and Shepard Fairy make a lot of statements about society and politics through their art, often, JPS' work will muster a laugh first, which is nice.
After all, it's not that serioius.
It's just life.