The Mary Poppins Effect
Highly recommended reading:
1. http://www.londoncyclist.co.uk/cycling-london/the-mary-poppins-effect/
2. http://letsgorideabike.com/blog/2011/03/my-take-on-the-mary-poppins-effect/
I wish I could say this is the reason I named my bicycle Mary Poppins! 😉