  It is not difficult to imagine how such an explanation might run. People experience a reaction to juvenile (or neotenous) characteristics of the young that is largely involuntary. This reaction is very complex, but one of its central characteristics is the inhibition of aggression. People are also quite poor at articulating the basis of this reaction, other than by repeated references to the fact that the child is “cute.” Of course, the overall strength of this reaction varies from individual to individual, and the particular strength varies with different children. Thus it is possible that biological parents simply find their own children “cuter” than stepparents do, and that this translates into a slightly lower average propensity to commit acts of aggression against them. Because they are unable to articulate the basis of this judgment, any analysis at the intentional level will simply fail to provide much in the way of an explanation for their actions.