@mw1525 I vaguely remember those base game vanilla days. I do remember clones of single parents appearing but I also saw zero slider children. I didn't really think much of them as they would usually be killed off by vanilla SP as my families started to grow and would never have been allowed into my sim families in any case. To me, Morty more resembles Gunther but only superficially. I think it's the nose that gives me that impression even though they are not really the same.
I agree that appearance doesn't factor into what makes a sim a sim. Rather it is their traits and life experiences that do. Having said that, I only play the game for genetics so appearance does matter. I don't gender switch sims for playing purposes, although I have done so on a couple of occasions when filling towns if the population balance was bad. I gender switch them in CAS to see if the features I like translate well to the opposite gender so I know what to expect when my sims have kids.