The ad has nearly naked women "enjoying" vegetables. Turn the sound down if you are at work.
http://www.huffingtonpost.com/2009/01/27/petas-veggie-sex-super-bo_n_161180.html
ETA: Here's the link to the ad on PETAs website. There are other deleted scenes, if you can bring yourself to click on a PETA link.
http://www.peta.org/content/standalone/VeggieLove/Default.aspx?c=pbsaec09