Amir Khan's PK (peekay) movie nude poster - whats going on ?

I just saw this :

Attachment 2271

So whats up with his transistor and why nude, apparently transistor is an important part of the movie as you see in poster as well was spotted in other places about this movie. Aamir Khan in this picture has posed nude, covering his modesty with an transistor.

In one other snap of the movie, he was wearing a ghaghra under a coat and again the transistor.

What do you guess, caste away Amir Khan's way ,, but can't be as he is seen well built..

They have also released a teaser on youtube:

https://www.youtube.com/watch?v=KDFDawjXsXg