For me, it all comes down to stench. I come from a family and a culture of daily showers or baths. There was one little English boy in my class whose parents rarely bathed him and the poor thing stank. The teachers had to tell him to ask his parents to bathe him more. It was horrible.
OTOH, I had a French roommate who only bathed on weekends when she went home but she did not stink. I thought it was odd, but it really did not affect my life or the lives of anyone around her.
And my US BF never smelled, never had BO. He still showered regularly, but unlike me, if he skipped one, no one was the wiser.
Yet is a surprising number of people around me day-to-day in my city in the North who smell rank, even just in passing on the street, sometimes entire jolly families strolling together, and I wonder how they can stand it. Public transportation can be really unpleasant because of BO.
I had a guy chat me up the other day and he smell sour and his hair and clothes looked dirty. Just how do you not recognise that? Do you not want to present your best face and body to the world?
Being around these people makes me realise just how the country must have smelled just a few decades ago when access to sanitary facilities was different.
In 2020 if you have facilities for keeping clean and you smell, there is no excuse for stinking.
Are you just the kind of person with no BO, OP?