The Westermarck effect, or reverse sexual imprinting, is a hypothetical psychological effect through which people who live in close domestic proximity during the first few years of their lives become desensitized to later sexual attraction.

In other words, the taboo against incest is not just social but biological. This has been observed in children who are not related but are raised in close proximity to each other. They rarely marry or have sex.

There is a stereotype that black men like fat women. It might not be a stereotype. One theory is that it happens because of sexual imprinting in childhood. The boy derides some of his sexual nature from the mother. If the mother is fat, he's more likely to prefer fat women when he gets older. The boy does not develop sexual feelings for his mother however because of the westermarck effect.  Sexual imprinting also helps to understand many fetishes.

Foot fetishes are very popular. If the male child is visual, and derives his sexual impulses from visual stimuli, than it's easier to understand where this fetish comes from. Children are short and often crawl about at the feet of their mother. The majority of people in the BDSM community were often spanked as children where the child's brain could easily correlate the love of a parent with the pain and embarrassment of spanking.

There are few relationships with a greater power differential than between a father and his daughter. The reality of hypergamy is that without the Westermarck effect daughters would be constantly trying to sleep with their fathers.

Black women's perceived sexual market value is often extremely overrated. Especially to white men who were generally raised by thinner mothers. However, if mothers are getting fatter, it's possible that the new generation of boys, regardless of race, will be more attracted to fat women. This will raise the value of fat women and fat acceptance could easily become fat praise. And it gets worse. If the feminization of males continue these fat women are likely to become mean and nasty. Not only that but if they don't mate select for financial reasons, they'll only do so for alpha status. It's possible that fat women will inherit the earth. The blogger who wrote that the future of America is what black society is today could be close to the truth, especially if the middle class is eliminated.