Logically, one would expect the opposite findings since animals have no morals, values, or laws that restrict them from incest.
Incest is sexual intercourse within the nuclear unit of the biological family. The phenomenon of incest is very well known and was very common in royal houses and nobles, but also in other places, against different backgrounds. Many countries worldwide do not have precise definitions in legislation of what is prohibited and what is permitted, so you will find maps that describe a legislative situation that prohibits or permits incest that you would not expect to find in the 21st century.
Incest is usually between an adult man and a young woman, sometimes literally a girl. The problem is that it is tough for young women to complain to the police about their father or older brother.
Other mammals often do not commit incest because they have an internal rejection mechanism that works through the subconscious mind. The exact mechanism exists in humans, but in mammals, there is no sexual conservatism or various prohibitions. If there are enough individuals of the opposite sex, there is no need for incest. Among humans, there are culturally many prohibitions, excessive sexual conservatism, and high availability of female family members at home.
If animals have an aversion to having sex within the nuclear family, why is the situation different for humans?
Humans also reject sex within the family unit, like other mammals, but humans have social considerations, sexual behavior, availability, and sexual prohibitions that do not exist in other animals.
- Research findings have shown that incest exists in many cross-sections of populations. At the same time, when there is no shortage of women in the natural environment, there is no reason to punish yourself over time.
What is the actual extent of incest? It is tough to know because a significant number of the victims do not reveal the painful affair at all and take with them the terrible burden and guilt to the grave! Condemnations of the phenomenon exist, but stringent laws that would prevent the phenomenon altogether would have been beneficial.
A mammal, when it avoids having sex within the nuclear family, is not due to moral imperatives.
A concern for offspring is also secondary. The explanation is that it loses energy in the act of incest; therefore, the phenomenon is relatively rare in the animal world. If you look for a chemical reason, you may not find it. The answer is found in mammals' subconscious world, which has a pineal gland. (Similar to humans)
- Animals avoid incest because it creates an immediate energetic repulsion in them. If they violate the rejection, they will pay with vital energy for survival and thus weaken themselves!
The subconscious can decode an energetic repulsion quite similar to that which occurs when the sexual orientation is not appropriate. The nuclear family members in the opposite sexes produce a magnetic repulsion similar to identical poles in a static magnet. Only a disruption in decoding the magnetic field makes incest possible. Nature aspires to entropy (disorder) because genetic diversity improves evolution and prevents morbidity.