Selina Kyle, a.k.a. Catwoman, is one of the oldest and most prominent characters in comic book history, having debuted in the first issue of Batman's self-titled series in 1940. According to Batman co-creator Bob Kane, he and Bill Finger wanted to inject sex appeal into their then-forthcoming Batman comic series, which is why they decided to base Selina Kyle on '30s movie star Jean Harlow, and why the character tends to wear skintight black leather.
A number of actresses have portrayed Catwoman over the years, beginning with Julie Newmar in the '60s, and they've each worn head-to-toe black leather. In the mid-'00s, Halle Berry's version of the costume became the most revealing of the bunch. She didn't mind, though; in fact, she found it one of the best parts of filming the critically maligned movie. "[The suit was] the highlight of the whole movie experience. It was empowering. Besides the obvious sex appeal, it really takes a certain level of confidence to pull it off. We all have physical flaws, but you can't hide them when you're wearing it."
Anne Hathaway, who played Catwoman in Christopher Nolan's The Dark Knight Rises, couldn't disagree more. "[The costume] was a psychological terrorist," Hathaway told Allure. "The suit, thoughts of my suit, changing my life so I would fit into that suit…It dominated my year. I went into the gym for ten months and didn't come out." That sentiment is something Michelle Pfeiffer, who played Catwoman in Tim Burton's Batman Returns, agrees with. "It was probably really unhealthy, and it would literally just start to squeeze my skin," Pfeiffer told E! Online. "I was only allowed to wear it for so many hours."