Humans are good at smelling cheese, sweat, and sweet odours because we have more receptors for them than anything else, probably to help us choose which foods to eat
Source:
https://www.newscientist.com/article/2211987-humans-are-good-at-smelling-cheese-thanks-to-special-smell-receptors/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home