The other thing to consider is that your nose stops smelling things eventually, once it gets used to the smell.
This is how you get people in nightclubs who smell like they been marinated in their perfume/ cologne! They put some on, then couldnt smell it half an hour later once their nose was used to the smell. So they put some more on. Then their mates came round for a couple of pre-beers or something, and by the time they go out they cant smell it again so they stick some more on.
Then they arrive at the club, thinking they have a subtle scent on, and everyone else nearby is having their eyebrows bleached free of charge..!
