We get used to things. This goes for lots of things in life including smells, sounds, sights, games, people, situations...seems like after a while we get used to everything.One reason we get used to everything is because of sensory adaptation, which is reduced sensitivity to stimulation that results from repeated presentations of that stimulation. For example, my car was in for service recently and the dealer gave me a rental to use while the car was being serviced. As soon as I got into the car I was overwhelmed by the smell of smoke (even though I asked for a non-smoking car). It stunk! But after driving the car for 30 minutes or so, I didn't really notice the smell. I got used to it because I was immersed in it. I experienced sensory adaptation.