KY JellyKY Lube Ad - This has to be one of the greatest print ads I've ever seen. I found this on a five year old post from Adland.
DPZ Propaganda, Brazil won gold in the 2002 Cannes Advertising Festival with this poster. Cannes Lions later withdrew the Gold saying
The Brazilian press drew the attention to the organisers on the fact that to the best of their knowledge DPZ Propaganda could not enter such work for a client handled by another agency. After a thorough check conducted by O Estado De S Paulo, the official Brazilian Representative of the Festival, it was concluded that DPZ's top management was caught by surprise on this issue. It seems that a junior creative of the Rio de Janeiro office took a regretful initiative when entering inappropriately these ads.
Here's another beauty that someone photoshopped - click both pics to blow up.
KY Jelly Mock Billboard KY Lube Ad