Is there a scientific basis for son preference?

The phenomenon of son preference has changed now, because there are few children at home, just one child, who can't tell the difference between light and heavy; With two children, you can distinguish a family with three children, and now there is a phenomenon of son preference.

Most families still have a traditional understanding that their daughters will marry sooner or later, which belongs to others; However, sons are different. A son will take his daughter-in-law home. They are his own family. So some parents don't want their hard-earned daughter's money to be given to others' homes with her daughter. On the contrary, they want their daughters to keep the money earned from their work at home to help their families prosper.

In the case of limited family economic situation, many families have to help their sons even if they are frugal, and may not necessarily do so for their daughters.

In society, no matter what line, if there is a position, under the same conditions, gay men are more likely to be promoted than lesbians;

There are also some behaviors, such as smoking and drinking, having an affair, which are all gay skills; It becomes indecent for lesbians, and so on.

In fact, this is the influence of feudal remnants.