The sex scene has been cause of some ridicule. Turns out a fuller version was filmed but edited out. It's still in the script out for awards, consideration though.
I'm glad what is in the script wasn't in the movie (since it seems even more awkward) but I do wish the edited version had been clearer that they weren't have genital-to-genital sex (which is what it looked like) but bonding through the hair things.
You can read the scene
here.