Sometime in the not-too-distant future, our robot overlords will tattoo bar-codes onto humans to keep track of us. But as you can see in this photo of Redditor midnightdown, in the present day, humans are tattooing robots onto themselves. If that's not the definition of irony, I simply haven't been paying close enough attention to old Alanis Morissette songs.

Click the image for the original, and click here for more Futurama tattoos.