They need a fresh supply of their "secret ingredient" to process through the meat grinder.
We have to take seriously the criticisms regarding these series.
Red flags were raised amid media delirium last week when the head of the jury for a national film festival openly condemned a movie on moral grounds, allegedly threatening to ban the movie from entering the national competition.
But when parents are related, there's a higher chance that both parents will carry the same unhealthy genes, which the offspring must then inherit.
The police say they also ensure support is provided for victims of incest but they will only access these resources if they report the matter.
When applied to inbreeding, the costs include the risk of passing on rare genetic diseases or defects, while the benefits include passing on genes more efficiently—as well as increasing mating opportunities.
But has called this assumption into question.
These studies also account for another dimension to mate selection.