It’s more likely that you experience “smellblindness” to certain chemicals. For example, I’m smellblind to whatever it is that makes skunk, body odour, and CS gas smell unpleasant, since none of these are unpleasant to me: skunk smells similar to gasoline, body odour smells similar to watermelon or cantaloupe, and tear gas smells like a cross between apples and Pine Sol. Many people are smellblind to different things and never realize it. I know for a fact, just from asking people, that there are many people like me, who don’t find the smell of skunk overly awful.