{This is the tenth in a semi-regular series of posts regarding great cinematic sex scenes as defined by me. This is completely arbitrary and open for interpretation, but so is life.}
"Sideways" is an excellent movie about friendship and wine as well as the chaos which ensues when you mix the two together during a bachelor party weekend. 
The sex scene which earned a place among the cinematic elite, however, is not the taut, silicone-enhanced variety which occurs during most bachelor parties, but instead, features a pair of individuals who are best seen in low-lighting.
This rendevous occurs near the end of the film as Thomas Hayden Church begs Paul Giammati to retrieve his wallet, an item which he left inside the house of a large, married waitress after her even larger husband came home early to discover the pair in a comprimising position. 
Following this romantic break-up, Giamatti sneaks inside the house to hear the bed creaking as the husband and wife are mating like wild porpoises and talking dirty to each other.
This seems like a very reality-based scene, and I won't ruin it completely for anyone who hasn't seen this film. Let's just say that things get far funnier and visually unappealing from there.
The elements of a foot race, thievery, pale skin and full frontal male nudity are involved, and the combination of elements makes for a hilarious scene that ranks among the truly elite.
-BDS
I watched that film at a friends cottage. The bottle of wine we had was finished pretty quickly and I fell asleep about 15 to 20 minutes in. Now I might go back and watch this movie, sobre.
I'll stick with the silicone enhanced well lit scenes, thank you.
I saw that film at the theatre and was crying I was laughing so hard at the .. well you know .. part.
WhatIgot - The vine makes sense with the movie for sure, but I'd stay awake for the full running time during yr. next go-around. It's worth it.
Heff - Then I would go with "Very Bad Things" as Kobe Tai fits that mold very, very well.
Miss Ash - I have an idea about the part, but I want to hear you say it. Ha. That scene was pretty damn funny, especially from the visual and flopping angle.
That was one of those scenes I watched through my hands over my eyes - it was hysterical and horrible at the same time. I also liked Sandra Oh clobbering TH Church.
I guess I'll have to rent it too. I really dislike Sandra Oh though so I hope it's worth it.
Anonymous Boxer - A good description, and I found that Sandra Oh scene to be painful to watch. I kept wanting to tell Church to cover his face because that helmet did some damage.
Nobich - I think it's definitely worth a rental, but it is a slow-moving movie that is more of a dramedy than a comedy (if that makes any sense). Enjoy w/ some wine.
I don't know if I would say "GREATEST sex around" haha Perhaps graphic? I did love this movie although it was slow in parts. In fact, I need to rent it and watch it again because I've forgotten some things. Thanks for refreshing my memory of this scene. *shudder*
H. Wood - Ha. Yeah, that's a fairly good barometer for other flicks & even TV shows (a la Hurley). It's a hell of a visual.
Jlee - In this case, yes, graphic would likely be a better word. But you can admit, you only want to re-watch because of this scene. Ha. It's OK Jlee.
So we're saying I should be totally wasted watching this movie? ok no problem!!
I totally loved the movie. The hubby, he always seems to find it on cable so we can watch it again and again! lolol
This is one of the funniest scenes on film! Not only as a sex scene, but a crazy chase scene as well. Naked or not, that big dude was pretty scary ... (hairy?!?) Good post!
Nobich - That certainly seems to be a theme, but only have enough vino to ehance your enjoyment and not so much that you fall asleep. Ha.
Gina - I own this one on DVD, and also read the book. Surprisingly enough, the movie was better than the book, which I rarely find to be the case. I mean, who doesn't love the "I'm not drinking any fucking Merlot" line? Ha.
Linda - Thanks, and you're right about the chase as you are just praying the Giammati will make it to the car and get it started. Just a phenomenal scene in a stellar film.
I think I'll pick it up next time I'm at the video store. I never say no to full frontal male nudity. Ooops, did I just say that out loud?
Ha. Yes, I think you forgot to filter that one, but beware as this is not a pretty site. You've been warned.