The power of wasabi isn't really the smell so much as it is a chemical interaction between allyl isothiocyanate and TRPA1. So in that sense it is more similar to the heat from a chili pepper than it is the aroma of something. I'm not positive, but I don't believe there is age related reduction in feelings of heat from capsaicin.
There is some chemical in certain shampoos that affects me more than most. The sensation is less like smelling and more like something is penetrating into my nose. It doesn't feel quite like burning or heat, but it's intense in a sort of similar way.
Sorry that's vague, but maybe this is a well-known thing.
