I heard that there was a deleted sex scene in Avatar to keep in PG-13 in the US. I think it's included in the version shown in other countries. So, I googled and found the "steamy" deleted part:
EXT. WILLOW GLADE
He puts his face close to hers. She rubs her cheek against his. He kisses her on the mouth. They explore each other.
Then she pulls back, eyes sparkling.
Kissing is very good. But we have something better.
She pulls him down until they are kneeling, facing each other on the faintly glowing moss.
Neytiri takes the end of her queue and raises it. Jake does the same, with trembling anticipation. The tendrils at the ends move with a life of their own, straining to be joined.
MACRO SHOT — The tendrils INTERTWINE with gentle undulations.
JAKE rocks with the direct contact between his nervous system and hers. The ultimate intimacy.
They come together into a kiss and sink down on the bed of moss, and ripples of light spread out around them.
THE WILLOWS sway, without wind, and the night is alive with pulsing energy as we DISSOLVE TO —
LATER. She is collapsed across his chest. Spent. He strokes her face tenderly.
Neytiri, you know my real body is far away, sleeping.
She raises up, placing her fingertips to his chest —
This body is real.
(she touches his forehead)
This spirit is real.
Her eyes are luminous, honest, infinitely deep.
When I was first your teacher, I hated all Sky People. But you have also taught me.
Spirit is all that matters.
She lays her head down, against his chest, listening to his heartbeat.
I am with you now, Jake. We are mated for life.
Yes. It is our way.
Oh. I forgot to tell?
He rouses up, making her look at him.
Really, we are?
It’s cool. I’m there.
He lays his head down, and her arms enfold him, sheltering him as he sleeps.
Whew. Tentacle Sex in Virtual 3-D! I'm shocked, shocked, I tell you.
So do you guys think my Jed's and Hell's 3-D Virtual Sex in Virtually Hers hotter than this scene? I mean, I'm jealous. Seriously. The ultimate intimacy indeed ;-). I think I'm going to have to make Jed and Hell blue in VR in the next book....