You want a fighter , ED give you a helicopter,you say :"no,that far from what i want ,so i won't buy it . but a few days later ,you buy it .
Then ED give you a attacker, you say :"though i don't like it all that much , i'll buy it , hoping the next one would be a fighter.
One year later, ED give you a fighter ,but turn out to be a warII fighter ,you got mad and starte to complain that I want a modern fighter.you swear you won't buy it this time .but a couple days later ,you buy it .
ED laughed in the heart: if I had gave you a modern fighter , would you've bought them.