I don't really have an aversion to babies, but the minute they begin to walk and talk, it all turns to shit. They start to observe and judge other people and things, and they start to have their own opinions, and they behave accordingly...yet without really having the knowledge, understanding, and empathy necessary to make such judgements.
People like to coo over how adorable and innocent children are ("aww those precious darlings, those dear defenseless lambs!"), but fail to recognize that children can be just as evil, self-absorbed, and selfish as adults are.