Nice post :) There is a small percentage of individuals which actually does not need to use deoderant because they are free of the stink-gene -> https://www.smithsonianmag.com/science-nature/a-lucky-two-percent-of-people-have-a-gene-for-stink-free-armpits-2508106/ Apparently, this gene is very common in koreans. Maybe that is nice topic for a future post :)