Quick question on KHII
 

Alright, I'm very confused on this. It seems to me that the Ansem you fought in KHI was just a Heartless of a guy named Xehanort, who was Ansem's assistant, but somehow transformed himself willingly into a Heartless and Nobody, the latter of which is named Mansex or some such. However, what confuses me is this: Why were the two working for different goals? They both wanted the same thing; something more to themselves. Although the Heartless Ansem wanted to replace what he had lost with power, Mansex wanted to fill the void in which his heart used to be. Why didn't they work together for a common goal?

Because the Nobodys probably thought that he was too unpredictable
also because (note: this is from my perspective) If and this is a BIG If
the heartless and the nobody come to close together than I beleave thay would Fuse togaether again thus they/he would be back at square one.

Actually, that doesn't happen. You clearly see during the 1000 heartless attack that some of them fight and kill Nobodies, so being near each other doesn't result on FUSIOOOON.

None of them were probably corresponding though.

They do just kind of summon those things out of the air.

But what if the two, after being seperated, are unable to recombine? I realize that both Sora and Kairi are exceptions to this, but the two had help from Ansem the Wise. Also, I wonder if, seeing as a split human becomes very powerful as both a Heartless and Nobody, maybe the combined form becomes that much more powerful? And perhaps Kingdom Hearts doesn't just GIVE you a heart, maybe you have to find the Heartless that has your original one and go in there with it? Ugh, enough of my questions. More answers. Please.

Also, thank you both for the conjecture. I'm sure we ALL have our own theories, but my hope is that we come up with one plausible theory through multiple theories on different parts, such as the Heartless/Nobody combination debate and what's going to happen with Cloud and Sephiroth, etc.

Thatr's because they didn't do the Fusion Dance!

Fusion.... ha!

What I want to know is why Ansem's Nobody was named Mansex when all the Nobodies' names were anagrams of their actual name plus the letter X and Ansem's name wasn't actually Ansem but rather Xehanort which would mean Mansex's name should really have been Norhatex X. Or whatever stupid thing.

Xehanort basically wanted to be Ansem to the point of renaming himself and trying to take Ansem's spot.

if their names are Anagrams of their real names Plus an extra X then Xehanort's name is --> NoHeart !

So it could be a nickname, right?