Gravity smells rather like the thundercats lair.
The smell of gravity actually differs according to where you are. For instance the smell of gravity on Jupiter is much stronger than on Earth. On Luna the smell of gravity is sort of lemony while on Saturn gravity sort of smells like coffee beans although you can only detect this with highly sensitive gravity devices because of all the other gases present on that planet. And not only that, the rings of Saturn are such a strong smell of puppy dogs that it tends to overpower the rest of the solar system in that general vicintiy. But on Earth, the smell of Gravity is somewhat similar to the smell of fresh yak milk with a hint of microsoft.