apocrine glands, like those in humans, produce an odorless, oily, opaque secretion that gains its characteristic odor upon bacterial decomposition.

Sweat kickstarts a bacterial feeding frenzy, leading to rapid binary fission (replication of bacteria which produce bad odour).

During winter my armpits do have a very mild smell, but during summer there’s a notable difference.

The first place most people hit with the soap is their armpits.

They’re creating a feedback loop condition for their armpits to smell worse in general.