Nudity in Deathly Hallows?

I know it's old news, but it was a slow day for me...

I just remembered hearing that there will be a sex scene in the Deathly Hallows movie.

First thought was: Is it necessary? I don't remember reading it... there might've been a HINT of it at the specified part of the book, but still... I guess they must really want to sex it up.

I guess if nothing else, the scene in question would be fast as a flash because of the context.