Marvel have revealed an interview with Artist Andy Park who was responsible for the look of the S.H.I.E.L.D characters in the Avengers. He tooks about how he decided to design Black Widows outfit and gadgets. I don’t think many men would have a problem designing a skin tight suit for Scarlett Johansson.
On how her outfit changed from Iron Man 2:
“Since Widow appeared in “Iron Man 2,” we had to start from there. Widow was one they were pretty happy with, so they didn’t want to deviate too far from that. From there, I did versions where she was a little more armored up for heavy combat. In this film, she’s going into full-on combat, so I did versions with more armor. We also looked at the comics and her gauntlet is the most iconic thing, aside from the cat suit.” – Andy Park
On designing Black Widow’s design compared to the rest of the Avengers:
“When we designed all the characters we were always keeping the others in mind. But at the end of the day, we knew the ones that were going to stand out were Hulk, Captain America, Thor and Iron Man because they are the most fantastical, versus the ones I designed, which were more S.H.I.E.L.D.-based–Widow, Hawkeye and the S.H.I.E.L.D. agents.”
“We had to tread that line between [making sure] they fit into the Avengers roster, but at the same time, I knew that their costumes had to look like they were made by S.H.I.E.L.D. Theirs were the most muted, so it couldn’t be too super hero-ish. It was more utilitarian and practical, more military-style combat suits.” – Andy Park
On designing the Widow’s Gauntlets even though she didn’t use them in the film:
“I wanted the gauntlets to be more utilitarian, so I did try to make them look like they had some tech in them. The initial intent was to have the gauntlets more teched out, instead of just a fashion accessory.” – Andy Park