Quote - Rex,Rox's,G1,G2 All have Genitalia.

Okay... so what? Mind you, this is a dirty old man asking you this.

I used to be among the first to demand that hey - maybe you should add/include genitals, damnit! However, I've learned a few things over the years...

warning - if you have kids watching, cover their eyes. I'll keep to the technical terminology, though.

If it has clothes on the crotch (see also the vast, vast, vast majority of renders outside of Renderotica), I usually have to hide the pubes and naughty bits to keep 'em from poking through the clothes. Even when the gens are built-in, most folks make the clothing with no regard for the existence of these bits, and usually they get it wrong (esp. for male meshes.) 

There's also the fact that because no two sets of penises/vaginas are alike, what's there is useless unless you work on it heavily because what morph dials exist for it are usually woefully inadequate for the job. And to top that off, a young man/woman has a far different-looking set than an old man/woman (e.g. an old man's ball sack will hang way lower than a young man's...)

Now get a good set of genital add-on kits, where the maker has taken its time to make it work, and work well? Now we're talking about a useful thing. 

Overall? Machts Nichts. If they're there, they're there. If not, I'm very sure someone will fill the gaps.