Yeah, but...if you can get through the baby stage, the next generation will have all kinds of Advantages that a newly-minted sim doesn't have...like, for instance, the ability to learn skills early in life, and thus progress through the career tracks faster...and have more time with which to woo a lover...which results in more babies...
I usually just create one sim -- often a female named Eve -- and populate an entire town with her offspring. I marry her off to a compatible townie, and roll a die for the children's aspirations. After a while, the great-grandkids of the original couple are sufficiently genetically removed that I can start inter-marrying them, but I only do that when the population becomes to dense for me to play all the households in the neighborhood. (I have a hard time juggling more than six or seven, even with an elaborate system of note cards to track career progress, skills, abilities, and aspirations.)
Oh, man. Now you know my dirtiest little secret: I am an absolutely hard to the core Sims player. I used to be more so, before Girlface was born, but I'm preoccupied with raising my actual babies most of the time now. It makes me cringe a little that I am so into this game, because it's so (unfairly, IMHO) maligned by self-styled hardcore gamers, but that's a different rant.
The Sims. I like it. That is all.
Damn, I really wish I had time to play right now.