As I've mentioned before I'm not a TES expert by any means. Nor have I played any previous TES game. Having said that here's my query:
Throughout the game you see several references to cross faction/species relationships. In my travels I have yet to come across a half-orc, half-mer (yes I know orcs are mer but work with me), half-argonian or half-khajit. (I'd assume that Breton, Nord, Imperial, Redguard are interchangeable enough that you wouldn't be able to notice a difference at first.)
Where are all the offsprings to those relationships? Surely over the years someone has had to have some progeny. If you travel to Shadowfen enough you'll even hear a Dunmer male exclaim, "I'm an uncle!" to which an Argonian asks whats its name without getting an answer because the Dunmer can't pronounce Argonian names.
Are they living in shame in remote outposts throughout Tameriel? Are they communing with the inhabitants of the Island of Misfit Toys? (A domain of Sheogorath to be sure)