Why can't a computer have ambitions and desires? Why can't it seek pleasure and feel pain? The only answer is dualism or we don't know how to wire it properly yet.
Or we don't have the proper design. If we want machines to be like animals, maybe we need to make them that way. Like the replicants in Blade Runner, or the humanoid "toasters" in the recent Battlestar Galactica.
It’s easy for a human to make another human, by combining with another human. If it’s the right human, it’s fun. If it’s the wrong human, it’s a disaster.
How to have fun and avoid disaster? That’s a definition of intelligence.