Speed is relative to your surroundings and the perception of speed is increased with external disturbances to the smoothness of the Z's typical behavior. For instance, I can take my wife on some of the fairly straight & smooth rural NM roads at 100+ mph and she doesn't blink an eye. I can unexpectedly take her through a 25 mph turn at 60 mph and she just might finger jab me in the eye.
However, I can take her through that same turn over and over again starting at say 30 mph while incrementing 5 mph each time and she gets used to it and actually asks if we can take that route home (true story). Also, giving into the taunts and challenges of any other drivers on the road just shows weakness and character flaws which doesn't usually fair well with most ladies.