One small nitpick...
I can't really imagine a male of any humanoid species adopting such a
prone position.
Honestly, looking over the body type, the clothes, and the poses (with clearly female sexual overtones) you've put her in, I'm finding myself really confused on how you understand this character to be biologically male.
I'd love to see, like, a diagram on the differences between sexes in the species you've created, or something. I'm assuming the males don't have external genitalia? And why do they have such developed mammary glands? Why do they look entirely like sexy bombshell chicks and not at all like a believable male of
any species?
Sorry, just had to point that out. Carry on!
Well, here's how her species is like (and she has no idea where she came from, mind you, she was found as an infant in a box with a note to take good care of her), both sexes are pretty much girls, just different plumbing. I mean if Trek can have people with handle bar-like noses, ears big enough to make Prince Chuck look small, and killer cybernetic zombies, than this is no real big deal, either.
With the body types and clothes....I outta show you some male to female transsexuals that you'd never know were unless they told you or you looked up their skirt (the non-ops that is) I mean, if you saw her, you'd think you'd be seeing a pretty genetic female.
http://img.photobucket.com/albums/v176/Primacron/2675860453.jpg And I know a ts girl named Jesse, who does adult, x-rated films, and she was really feminine all her life, even as a boy, people kept think she was a girl, even them, going "oh, you have such a pretty daughter!" And only operations she had was a boob job; she's had nothing else and not even hormones. And here's 3 more girls at a party taking a photo together
http://img.photobucket.com/albums/v176/Primacron/godesses_162.jpg and I'd not throw any of them out of my bedroom, I tell you what.

Hell, one of the girls in the James bond movies, "For Your Eyes Only", was a transsexual. Same goes for that one TV show Baldwin was in, which had Candace Cane, a transsexual, in it. Plus I speak to a person who works in the runway, catwalk modeling business, and quite a few of those girls are, in fact, male. And there's Andrej Pejic who's taking the modeling business nicely as well, he's a male, but is extremely feminine looking, and gorgeous, I might add.
Plus there's other femme males who are pretty much girls in looks and mentality.
http://www.youtube.com/watch?v=J6eKi_1WfEk
http://www.youtube.com/watch?v=MJNCxmbbdMA
http://www.youtube.com/watch?v=HvpUTWycHvE
And for the flip side, there's many, many women out there that you'd think were men. I mean look at all the Rosie O'Donnels, Janet Renos, and those women with the square shaped bodies, faces that look like John Goodman or Mark Henry. Plus there are many whom behave and act like men, from their clothes, to how they carry themselves, or to just how they interact with other people. So it's not a big stretch to realize that sex and gender can be totally separate from each other. I wish T'Gurl was here to toss in her own thoughts on this issue as well.
As for Cassy, I used a female Daz/Poser model, Aiko4 to be exact, and I actually did as much as I can to adjust the body, I made the hips small, boobs MUCH smaller (you'll notice she is very small on top, nearly flat chested, check out her tube top fighting the giant centipede, she's does not have that much on her chest breast wise) and waist a little wider. If I could have, I would have put a bulge in the front of her jeans or skirt, but the was unable to with the Aiko4 model.
While Cassy is biologically "a boy", she still is a she, if that seems less confusing or more for you. The universe is a weird and amazing place, I mean we have animals on earth with both sex organs and creatures who reproduce asexually, and I have been doing a good deal of research UFO and alien topic (despite what some of the naysayers on this forum will say other wise, since it seems to be a dirty issue), and there's so many amazing sort of aliens encounter by us, that a species of alien that are rather feminine in nature, despite whether they have a hole or a pole.
I also made Cassy with another reason as well: To both test the waters and push the envelope on characters in science fiction and fantasy, to make a heroine who not either the run of the mill porn star with big tits you see in comic books or the frumpy, plain Jane's you see in Star Wars (the non royalty and non sex slave types) or Aliens. To have a smart, strong likable, and beautiful character that can either fight Daleks and giant centipedes or able to sit down and discuss hyper-dimensional physics and quantum theory, and pretty much take traditional gender roles and toss them out the window, so much the better. I mean if someone has issues with the character of Cassy because of what's lurking under her thong, then they need to probably stop and think for a little bit about themselves.
And, no, finding Cassy attractive, despite having a trouser snake, does not make someone gay.
