A good example would be moving into a sewer, after a few weeks you would no longer notice the fetid smell. So one must ask people who have gone to places where gravity is largely absent, i.e. orbit. Astronauts say that 'the air' of their cabins often seem dry and metallic and flat, thus gravity must provide a softening, mostening smell to the air we breathe. It smells just like the inside of a basketball but at much less concentration. All you need to do to prove this is get really close to the ground and you will notice how much more it smells like a basketball then if you are walking around normally.
Gravity is a force.
Forces do not have mass. Gravity can not have a smell. Now what ever has amassed at the center piont of the gravitational field can have a smell, but not the forces that put the masses there. Ok, i believe that gravity smells like feet. Not just regular feet but the really smelly feet that your grandpa or dad, or someone with just smelly feet has.