Do you give your Sim children plastic surgery if they don't look pretty enough for you?

I like variety in my game, and I find the DNA mixing to be one of the most exciting things in the game. When a new sim is born I'm in awe, constantly searching to learn that sim's personality, and sometimes the looks help... Even if only 1 out of 10 sims turn out quite nice looking, the joy is more than 10 times bigger than if I should adjust them all :)