If Homer was the smarter, calmer, saner parent most of the time and Marge was the dumber, short-tempered, crazy parent most of the time, The Simpsons would get slammed for attacking women. Same if Bart was the smart, obedient, respectful child and Lisa that less smart, rebellious child.<p>Similar if Lenny and Carl's roles were reversed. The Simpsons would be slammed for making the black guy the dumber one.<p>It's simply safer to make it so white (well, yellow in The Simpsons universe...) males are the ones who are dumb, impulsive, try out hare-brained schemes, and so on, and since it is out of those things that most of the comedy arises, those characters are going to get the most words.