Cameron told reporters at Comic Con, that he kept tweaking his Na'Vi aliens, asking his all-male crew over and over, "Would you want to do her?" (Probably in reference to Zoe Saldana's Neytiri.) So now that you've seen the movie's trailer — and many of you have seen 16 minutes of the film in full-on 3-D Imax — what's your verdict?

Actually, Spermula is a weird mixture of extreme campiness and artsy beauty. There's a random subplot involving a troupe of circus performers, who include a little person as well as a contortionist whose only trick is that he can pleasure himself. But then you get this weirdly gorgeous sequence where the Spermulites use telepathy to ensnare a priest:

And then there's this weird sequence where they turn a human woman into one of them, by "dehumanizing" her and converting her into a sperm-draining creature:

All of the Spermulites are supposed to be turned into beautiful women, but one of them is turned into Udo Kier by mistake. And he has an incredibly tiny penis, which everybody refers to constantly. (Seriously, every scene he's in, they bring it up.) Here he is, pleading with the leader of the Spermulites to give him a bigger penis. I love the part where he insists that he was made for physical pleasure:

We featured Space Thing in our roundup of the most embarrassing mating sequences of all time, but it deserves its own post. Steve Vincent is James Granilla, a man who's reading science fiction in bed with his wife. She, of course, just wants him to stop reading and pay attention to her, leading to this ridiculous sequence. Do you have any clue whatsoever what James is talking about here?

James then falls asleep, and the rest of the movie is his dream about space exploration, which — weirdly, considering how badly he didn't want to have sex before — is all about having nonstop sex. He winds up having sex with all of the women in Captain Mother's crew, including Captain Mother herself. And then he has this unforgettable confrontation with another male crewman, who's jealous that none of these women wanted to have sex with him. I love the random naked chick being like, "Hey, you disintegrated him!" and the other naked chick wandering into the frame and saying "Aww, he had it coming."

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Yes, the evil aliens in Decoys (and Decoys 2) mate by sticking their tentacles down a human male's throat and then impregnating him with their eggs. And for some reason they have to use their shapeshifting and telepathy to turn themselves into the guy's ultimate fantasy first - so he'll be really, really excited. And the mating must take place at sub-zero temperatures. Got it? Good.

The most awkward scenes of alien mating run the gamut from cheesy space-opera mating to full-on I-can't-believe-they-went-there porn. And yes, some of the clips below are not work-safe, so exercise discretion.

Star Trek: The Next Generation:

Trek, in all its various incarnations, has always been full of unfortunate alien mating moments. But for my money, this is the worst - it's actually the scene that inspired me to track down all the rest of these clips. Riker, blessed with the power of Q, decides to give Worf a Klingon girlfriend... who crawls around the Enterprise bridge in a Klingon aerobics instructor outfit. "Is this your idea of sex?" Geordi asks, awestruck. "This... is... sex!" Worf howls. Ummm. yeah.

Breeders:

Oh dear. An alien has been capturing women and attemting to mate with them. Here they are, in the alien's mental thrall, coating their naked bodies with its extraterrestrial sperm. And yes, it's NSFW:

Futurama:

Poor Dr. Zoidberg. His "erotic display" just doesn't turn out that well.

Weird Science:

In one episode of the short-lived TV series, their friend Chet starts dating an alien woman. Unfortunately, she wants to devour him after sex. Luckily, his ex-girlfriend intervenes just in time.

Babylon 5:

A similar mating practice crops up in this scene from B5's pilot. Commander Sinclair, he's a life-saver.

Space Thing:

An alien in human form, Col. Granilla, comes aboard a human spaceship commanded by women. It's up to this nice Kansas girl to teach him the ways of human mating. Clip is NSFW:

Something Is Out There:

Hand sex! Maryam D'Abo comes from an alien race who keep their erogenous zones in their hands. Here she is, getting it on with her boyfriend before their ship suffers a prison break. Clip is very work-safe, unless hand-sex offends you.

Quark:

This Star Trek spoof featured an episode where Ficus, the unemotional plant man (who's the counterpart of Mr. Spock) has to seduce Princess Libido, who's fallen in love with him. His objective is to use his sexual wiles to convince Libido to help him and his crewmates escape from her evil father. There's just one problem: Ficus doesn't have sex like normal people. He reproduces by pollinating. He's only too happy to show Libido how.

Species 2:

Eve, a clone of Sil, gets so excited she squishes a baseball. It's all because an astronaut, Patrick, has brought something alien back to Earth with him, and it manifests itself while he has sex with a debutante, and then her sister. The debutante suddenly gets very, very pregnant, while the sister notices that Patrick is growing rather a lot of tentacles during sex. Later, Patrick and Eve get together, and Eve's nipples grow tentacles, which I've never seen before. Clips are very, very NSFW:

Society:

Walking in on your parents having sex is bad enough — but what if you've learned your parents are aliens, who have sex by melting their flesh and blending together into weird and monstrous forms? And your sister is also an alien, and her head comes out of your mother's crotch? And asks you if you have any Oedipal fantasies? You might be put off sex for quite some time. This clip may actually be work safe, hard to say.

Inseminoid:

A human gets tied up and subjected to mating with an alien whose penis is a giant bong. This NSFW clip already featured as a "found footage," but I had to include it for completeness. Warning: very NSFW!

The Outer Limits:

Commenter Roklimber suggested this bizarre NSFW scene from a 1995 episode. Alyssa Milano is a nice college girl, until she gets hit with a spore from outer space. And then she suddenly wants to have sex with lots of guys... by absorbing them into herself.

Evil Aliens:

Nerdy Gavin finally gets to have sex with an alien woman, but finds out it's not all it's cracked up to be. And meanwhile, a woman named Foxy gets implanted with an alien fetus. And yes, it's NSFW.

Additional reporting by Alasdair Wilkins.