You used to only be able to get chocolate eggs at Easter. That's why they were called Easter eggs. Then Kinder Surprise came along and buggered that all up. Suddenly chocolate eggs were available the whole year round which really made Easter far less special. They also put toys inside the eggs. So now when kids crack open their Easter eggs they probably just become really disappointed at the lack of a crappy plastic toy inside.
I believe chocolate eggs should be banned for eleven months of the year. They should also ban imported mangoes so you can appreciate mango season that much more.