Some people have horrible body odor and it isn’t from pot smoking.
I knew a guy that every time he got in someone’s car, the other people in that car wanted to puke.
There are plenty of products out there, including a nice hot shower to keep a person from stinking.
I once had a customer like that. Had to sit in meetings with him regularly, take him to dinner, etc... Very heavy guy, wheezed when he talked, sloppy dresser, stank of terrible BO. He presented himself as the owner, which puzzled me.
I learned later he was only a minor partner, and other partners eventually succeeded in buying him out / getting rid of him, for other issues besides just the B.O. Never fully understood why he was allowed to have a "public-facing" job, even if he was a relative of the company founder.
I had a friend in high school who showered multiple times a day, particularly in summer, and had BO that would knock over a water buffalo. He tried everything, the poor guy.
His younger brother did not have this problem.
There are some cases of some people with a medical condition that causes really offensive body odor and even after a shower the smell exudes very quickly. It’s called Bromhidrosis, IIRC.
I was eating in a Burger King once, the place was almost empty at the time. A person of Asian descent (not black) sat down not far from me. The odor was so bad I had to move well away from him so I wouldn’t vomit.
I can’t imagine how awful it would be to be cooped up in an airliner with someone like that.