I was walking down a road a few years back when a car passed with the windows open. Even though the car was traveling at around 35 mph, the load of perfume that hit me in transit, almost choked me. There was a guy riding in the car, with a woman driver. Considering how much redisual perfume was being emitted by that car, the guy probably had no sense of smell, and the car was probably about as safe to be in as the inside of a gasoline bomb.