Do you give your Sim children plastic surgery if they don't look pretty enough for you?
I know some players like their Sims to be perfect and I've seen even children been given bigger eyes, poutier lips and their bodies made skinnier etc. I've even seen this done on 100 baby challenge ki...
I prefer to see how things play out with a family instead of making them all be perfect. Some of my most beautiful sims are ones that have been made through the game and not by me!!