I was dressed as a 1950s housewife because I've been obsessed with 1950s fashion for my whole life.
In fact, I was so into housewife fashion in high school that I actually wrote an article on it a few months earlier. I imagine either the article research inspired the costume, or costume research inspired the article.
You might also be interested to know that the girl in the upper left hand corner, dressed like Holly Go Lightly, was the inspiration behind "This Is The Last Time I Will Ever See You."
Happy Halloween, folks! Have a fun and scary holiday tomorrow!