Here, there, everywhere

What does your street art tell you? The street art in my neighborhood points out differences, how sometimes one thing is different than the others, and how there should be humor everywhere.
Can you spot what's different here? One thing is unlike the others. Ah, yes, you guessed it--that one's not a banana! One might think that finding random images of a penis banana popping up all over your community could be disturbing; however, seeing the sticker on free weekly newspaper boxes always makes me smile. I really enjoy when I'm made aware of its presence again, like when a group of girls stop surprised and pointing then begin to laugh and discuss it.

Banana penis sticker artist, who are you? Why have you done this? Why haven't you done more? What's next?