Oddly, this small thin person, has little body odor versus other average people. Body odor varies greatly and tends to be genetic, diet, and sex frequency, related. Yeah, smelly persons may reflect more frequent sexual activity. Also cigarette nicotine smokers have distinctive odors to the extent I would never be able to have a close gal friend that smokes. Note, have never been much of a red meat or spicy foods eater.
Different ethnic races have distinctive body odors even after thorough bathing. In my own large family it varied greatly. Some men have disgustingly bad smelling feet and shoes.
I can wear the same socks for days without hardly any change. My ski boots have little odor while acquaintances footwear if in a car during road trips up to Tahoe need to be put in sealed plastic bags.
Over my adult lifetime, I've only had a single gym membership but was not able to use it because I could not stand weight room smells. I obviously have a strong sensitive sense of smell and love smelling fresh flowers, especially fragrant roses.