Smells cannot generally be described, except for being either "good" or "bad"; Which is mainly opinionated, anyway. The conceptual smell of cheese would depend on a few things, such as: What type of cheese it is, how old the cheese is, and even how it was processed.
The best way to determine what cheese 'actually' smells like is to go sniff some.
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For some people it does. if you're asking if the cheese is spoiled, it depends. if cheese doesn't smell funny to you, and if it is smelling funny, its probably spoiled. if it usually smells funny to you, then who knows?
Switzerland has more than one cheese.
The smells vary, but none is really unpleasant.