Well this is what they are going to be surprised about in the experience which will occur. From Family Media Guide Brokeback Mountain Review
Sexual Examples in context: A man kneels behind another man who is on his hands and knees and they engage in sodomy.
From pluggedinonline.com review
Several scenes show the two men groping each other and kissing. (Half the time it looks more like forceful mashing than kissing.) Once, the camera keeps staring as kisses give way to anal sex. (There's no nudity shown, but the sequence is explicit; it includes sexual motions and sounds.)
DAvid Kupelian also wrote an excellent review of the movie called "Brokeback Mountain: Rape of the Marlboro Man" - the agenda here is not so hidden. The pervs of Hollywood have taken over the industry to de-sensitize and normalize behavior that is neither normal nor moral. The trailers on TV are deceptive. People who go to this movie and are upset once they find out the truth need to get up out of their seats and go to the Management demanding their money back, or at the very least - a pass to another movie. Make a scene, folks. You have been lied to and ripped off. Not everyone has a computer to find out what is really going on.
Here is the link:
http://www.worldnetdaily.com/news/article.asp?ARTICLE_ID=48076