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The activity change during puberty suggests that humans communicate through odors. [4] Several axillary steroids have been described as possible human pheromones: androstadienol, androstadienone, androstenone, androstenol, and androsterone. Androstenol is the putative female pheromone. [5]
Signal pheromones act as attractants and repellents; they are classified short-term behavioral pheromones. Primer pheromones produce long term changes in human behavior and hormone production. The vomeronasal organ is used to detect the pheromones of others. Pheromones emitted from sweat glands play a role in sexual attraction, sexual repulsion ...
Male-produced sex attractants have been called aggregation pheromones, because they usually result in the arrival of both sexes at a calling site and increase the density of conspecifics surrounding the pheromone source. Most sex pheromones are produced by the females; only a small percentage of sex attractants are produced by males. [7]
Compared to other primates, humans have extensive axillary hair and have many odor producing sources, in particular many apocrine glands. [18] In humans, the apocrine glands have the ability to secrete pheromones. These steroid compounds are produced within the peroxisomes of the apocrine glands by enzymes such as mevalonate kinases. [19]
The increased production of sebum can lead to a blockage of the sebaceous gland duct. This can cause a comedo (commonly called a blackhead or a whitehead), which can lead to infection, particularly by the bacteria Cutibacterium acnes. This can inflame the comedones, which then change into the characteristic acne lesions. Comedones generally ...
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“With the change to femininity the clitoris should wholly or in part hand over its sensitivity, and at the same time its importance, to the vagina,” Freud writes. This false conclusion is nearly universally adopted, and although it has been since debunked, it still informs the culture of sex and sexuality throughout the Western world.
There are three types of sweat glands: eccrine, apocrine, and apoeccrine. [1] Apocrine glands are primarily responsible for body malodor and, along with apoeccrine glands, are mostly expressed in the axillary (underarm) regions, whereas eccrine glands are distributed throughout virtually all of the rest of the skin in the body, although they are also particularly expressed in the axillary ...