Recent extensive studies in the US, Australia and the UK show evidence of startling new potential dangers.

Households formed by a single mother and her unemployed adult son report a massive number of instances of incestuous sexual acts. Studies suggest that around 75-90% of such households may experience incest related phenomena. By examining case studies, researchers have been able to pinpoint potential triggers and catalyst to these instances.

#Close living quarters

This specific household type often resides in a small apartment, usually a two-bedroom. The single mother and son only rarely leave their home to do business. The enclosed living space and staying indoors compounds the normal effects of living together:

-High chance of involuntary nudity

Close living quarters may cause involuntary sightings of the other resident fully or partially nude. 

 -Pheromone accumulation

Healthy adult males and females secrete pheromones in varying amounts. These pheromones act as a signal to the other sex to promote mating. This evolutionary advantage is from a time before indoor living. If humans still lived outside, the pheromones effect would be negligible.

As studied household types living area is so small and enclosed, and neither resident leaves for a long enough time, male and female pheromones begin to accumulate in the indoor air. As the amount of pheromones in the air increases, the residents sense it more and more, triggering an increase in their own pheromone production. A cycle emerges, and pheromone saturation may reach a level over 2000 times normal in few months.

These abnormal pheromone levels will trigger varying effects in the residents detecting them. 

*Male

If a male senses female pheromones, his body will begin producing more male pheromones. If the female pheromones are potent, his body will also begin preparing itself for impregnation. His sperm count will begin rising steadily and the amount of semen produced will be multiplied.

Extreme levels of female pheromone will however trigger further effects. The male's testorone will spike up to 5 times normal, and his body may experience effects similar to puberty. His genitals grow over 3 times their normal size, and his penis may become permanently partially erect. He may also begin to drip small amounts of semen constantly. He will be getting random unintented erections every day, often quickly leading to involuntary limited ejaculation, where he will ejaculate only a single pulse of semen.

Researchers believe these effects are a evolutionary remnant from breeding behaviour, possibly a way for males to prove their fertility to nearby females.

*Female

If a female senses male pheromones, she will begin secreting her own pheromones. In the presence of potent male pheromones, the female body will begin to prepare itself for impregnation. 

With extreme levels of male pheromones however, the effects will go beyond the normal reproductive cycle. Massive levels of male pheromones  trigger a surge of female hormones. If the woman in question has undergone menopause, her body will reactivate all reproductive systems.Her body will experience effects similar to puberty. Her breast quadruple in size and may even begin to produce milk permanently without pregnancy. Her nipples will grow thicker and milk may begin to drip constantly (some women may even have to be milked daily). Her body will begin to accumulate fat amd muscle to sexually signaling areas of the body (buttocks, thighs, lower back, pubic mound, etc.). Her vagina will become constantly lubricated, often so much so that she may be unable to wear pants due to the moisture (skirts are recommended by the women studied). Her ovaries will begin to work with extreme effiency, making sure that her womb is always ready to be impregnated by a virile male. 

Impending Result

As the pheromone cycle is left uninterrupted, both mother and son will show extreme changes in their physique within a few weeks or months. They will inevitable notice the physical changes in the other.