Penguin Prostitution: Paid in Rocks | Deep into the Wild | BBC Earth

Even in the seemingly monogamous world of penguins there is infidelity as Nick Baker discovers. Yet when a single male penguin feels amorous he's going to need a steady supply of stones as payment to fulfil his sexual desire! Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth