I'm not sure I like it here any more.

[LeftInTX]

223. It's generally about smelly armpits. Everyone sweats, but those with hairier armpits seem to have more types of glands

Those hairs contain apocrine glands



https://asm.org/articles/2021/december/microbial-origins-of-body-odor

Body odor is primarily caused by apocrine sweat glands that become activated during puberty. These sweat glands develop in hairy regions like the armpits, genitals and scalp, where they secrete an oily fluid comprised of proteins, lipids and steroids. Contrary to popular belief, this viscous fluid (sweat) is naturally almost entirely odorless. It is only when members of the skin microbiota metabolize these secretions that they produce the malodorous byproducts, which cause body odor. In humans, armpits offer a moist, warm environment where microbes can thrive, making them a microbial hotspot.

The underarm body odor has been linked to a gene called ABCC11, which encodes a protein that transports molecules across cellular membranes, including molecules in the sweat. If the ABCC11 gene is non-functional, sweat molecules are unable to cross the membrane barrier to reach the armpit. This starves bacteria on the other side of the skin surface, as they are unable to access or metabolize the organic compounds in the sweat. As a result, odorant substances are not produced. Loss-of-function ABCC11 mutation is fairly common in East Asian populations (80-95%).


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Hubby is Latino and Native American. He's never had smelly armpits, ever. He doesn't have much body hair either.

Everyone sweats, but some just have more apocrine glands and those correspond with hair.