Sonic the Hedgehog - "I like to think that Vanilla also takes care of Amy like one more daughter." - by Toonsite.

Amy has worn shorts while at the Olympic Games, so I guess she only cares about her modesty at big public events. Or maybe the staff forced them on her.

And thus, Boom Amy was born.

Also, considering you can get the same angles with Cream in Heroes, I think Vanilla should start a little closer to home.