Honestly I don't know what the natural smell of a healthy, clean but unwashed/water-washed, un-perfumed etc female is, but I think that's the smell I'd find most attractive, strong or not. Although as I haven't experienced it, I don't know what that smell is.
Well now my smell is much less intense then before. Its like a mix of very light musk, ocean and some kind of fruit but I don't know which, lol ... I kind of like it...There was a time when I was doing chemical drugs and my body sweat smelled horrible, when I stopped the smell improved, when I changed the diet it improved further.
I have smelled men with horrible body odor and some who smelled interesting, but most men wear these nasty chemical deodorants & colognes so I never know the real smell
By boyfriend - as much as I love him - has a very pungent/strong underarm smell if he forgets to shower for a while so at times it can get a little too intense. But then again I have a very very sensitive sense of smell which probably makes it worse. However I prefer that much over cologne and perfume. And depending on how I feel it can be sexy.
I remember when I was really young there was this guy that whenever he walked past me had this amazing smell that really attracted me, later I befriended him and found out he smokes a shitload of weed all the time, so much that the smell of the weed was always coming out of his sweat glands, but mixed with his sweat it created an amazingly pleasant smell (at that time I didn't smoke pot so I had no idea that that was the smell I was being attracted to heh heh)
