First, 'Zack and Miri Make a Porno' director Kevin Smith gets pulled up by the MPAA for releasing an online teaser for the movie without first submitting it to them for a rating. Then, when the movie is completed and submitted for rating, they give it a rating equivalent to box-office poison (NC-17) and force smith to firstly cut the movie then go through a ratings appeal process. Now they're taking shots at the film's poster campaign!

The MPAA have oficially rejected the above poster for containing 'sexually suggestive imagery'.
Smith had this to say about the matter:
“When you’ve got the word ‘porno’ in the title, naturally, the marketing materials are gonna be scrutinized more closely by the MPAA... I understand they’ve got a job to do, but c’mon… this image isn’t that dirty; they’re both fully clad.”
The most interesting this about this case, to my mind, is that a very similar poster (some would say even more raunchy) for the "hilarious" Dane Cook comedy 'Good Luck Chuck' was allowed last year with minimal fuss from the ratings board. Check it out below.

So, the question becomes; do the MPAA just have it in for Kevin Smith? Or is there another reason this poster is being quashed? Anyone here who has seen the documentary 'This Film is Not Yet Rated' (in which Smith actually appeared) will know that the MPAA are notorious for suppressing films in which women are seen to be recieving sexual gratification, it appears to be somewhat of a hot-button for them. It's as if they hate the idea of the female orgasm. I get a strong feeling that this is why Zack and Miri are being hidden away while Lucky Dane was let loose for all to see.
Source:
Film School Rejects