My standard reply when I smell things that no one else can is, "Well, you will in about 10 minutes!" I have no idea why I have this super sense of smell, although I have heard it is a common Aspie trait.
It is not fun, either, because I can smell everybody's fabric softener, hand lotion, hair products, and every other fragranced layer on their bodies, as well as the more personal things that nobody wants to smell.
The intensity of these smells, which no one else seems to be aware of, gives me headaches and nausea.
On the plus side, I am the one who can smell oil or gas leaks, fire and smoke before the alarms even go off, so I'm kind of handy to have around. Also, I'm an amazing cook (
not meaning to brag) because of my sharp senses of taste and smell.