I know a small nation in Russia, where sex with mom, this was the norm quite recently. Well, so as not to cause, say, national unrest and indignation, I simply will not name the name of this small nation.
There is simply a cult of the father, and the mother is something so insignificant that all the men in the family, not just the father, can fuck..
Plus, in this regard of incest, male and female sexual peaks are very similar. Boys have a sexual peak in adolescence, and women their 35-45.
It turns out to be the perfect combination.
That is, this is not a phenomenon of our time, when women retain their beauty until old age.
This is a very ancient behavior that has simply been preserved in certain cultures to this day.
For example, some Slavs have teenagers who fuck their mothers before accepting and taking root of Christianity, it seems like the patriarch himself once mentioned this.
I just have information about the preservation of this system of sex education, or just sex life, among one people.
In fact, there may be more than one or two such peoples around the world...
I think the topic will be blocked, because in the Russian Federation everyone is patriots and bond-bearers and not mothers fuck

Sent after 13 minutes 43 seconds:
The story is that relatively recently in the history of mankind and for a long period of millions (million) years, the so-called "group marriage" took place
And there the problem of older sexual females was solved simply, they were fucked by lower-ranking males, including teenagers (teenagers always have low status until they are initiated into men). In early communities there was no concept of mother, father, son, daughter. This is a group where you can know which of the many sexual partners was the father, for example...
Therefore, the genetic memory tells the teenager that nearby females need to be fucked, regardless of their degree of relationship. And the mother is just a very closely located female, who will pat you on the head, press you to the tits and straighten them gently...
That’s why in many cultures they simply divided the house into female and male halves, where entering the other half is simply prohibited. Muslim culture for example.