A person’s individual smell cannot be changed and is as individual as a fingerprint. Here, sweat development is fundamentally something positive: Sweat maintains the skins elasticity, cools it down when it is too hot and is important for people’s metabolism.
The smell of sweat, which people think is unpleasant, first occurs when the flora of the skin is disturbed. Old sweat which could not evaporate plus a moist body climate is the perfect hotspot for bacteria and for the decomposition process, from which the acrid smell of sweat can develop. Naturally, it’s particularly unpleasant in summer when lots of people meet up when it is very hot.