Yeah, I've thought of that too. But they're supposed to be rare in the lore of the game, so it makes sense you can't start as one.
I could have sworn you could add fur/scales in the lab, but after a quick check with a human slave, there doesn't seem to be. That is something I'm sure many would enjoy the ability to do. Even if only for the ability to then enhance it to make the slave more effective in combat.
I don't generally have anything to do with penises, other than my own, so I never touch that option in the lab.. I like sexing 'em up with mah peen, but I also like boobs. Best of both worlds xP
I prefer not getting 'em preggers, it's just a waste of time for me. I'm not a pregnancy fetishist. And I just don't see the point in pregnancy. You lose the slave for a few days, and get a randomly generated generic slave. Not really that impressive when you can get one that meets your standards by just hunting for 'em.
But that's just my opinion. Maybe you'll get your wish. As I said, this is just a place to post and discuss. Whether it's added is up to the creator.