PWF Profile - Irkens

In the PWF universe, I have given Irkens certain traits. Whether or not this goes against some actual traits, I don't really care. I'll try to stick as close to Jhonen's Irkens as I can, but I have bent them into a certain model that goes along with the story of PWF.
Of course, they're green, and their bodies are no more than hosts controlled by paks. They still have fuctioning organs, though. Squeedlyspooch!
In fanfiction, people have been known to give their Irkens blue, purple, or even pink blood. However, I've stuck with red. It isn't as dark and crimson as our blood, but sort of orange tinted, sort of like the color of blood of someone who has anemia. If you've ever seen Jisatsu Sakuru (Suicide Circle, also known as Suicide Club), that's the color of my Irkens' blood. Oh, you can just tell the blood is fake in Suicide Club. XD So orange. Irkens also heal much faster than humans. A bruise or deep cut could be fully healed within just a few hours.
Irkens don't need to eat. They only eat for taste. They mostly eat junk food, so because of this, Zim is able to stomach certain human foods such as cake and stuff.
Also, as Dib discovers with Zim, Irkens have very soft skin. Why? Who knows. How is it beneficial to their survival? They're already very strong and very fast, but what could soft skin possibly do for them? I don't think they even know. They're not even aware of it, for they do not touch anyone, not even members of their own race.
I've given Irkens belly buttons. :3 How is that possible? Well, they are humanoid creatures, so I figured it would make sense that, even though they are born from tubes, they have some sort of umbilical chord. Irken's have similar reproductive organs to humans... ironically they have the same outer parts. Irken females have the ability to give birth if fertilized, but their society has been forbidden to reproduce for centuries. They aren't even allowed to have relationships of any kind. They are creatures of war, so they've been conditioned to not even think about sex or have urges. Zim's brainwashing was undone when Dib kissed him.
So how do Irkens reproduce exactly? Genes are collected from superior invaders and put together in tubes. Inside these tubes, the smeet grows slowly. Their umbilical chords are attatched to a small pipe thing to help give the Irken's host body enough nutrition to be born into the world healthy and ripe for conquest. The gestation period in these tubes is one Irken year. The difference between Irken years and human years is unknown, but there's a large gap, a few hundred years.
If genes are collected from superior invaders, how do you explain Zim? Who the hell knows. Maybe the gene collectors made a mistake, or maybe something happened in the tube while he was being developed.
So, why aren't Irkens allowed to have sex? They're never actually told WHY, just that they're not supposed to. The Tallests know why... but no one else knows, save for the Control Brains, of course.

More info to come.