"I think that’s stupid," she said. "The father who flipped out about it, 'What am I going to tell my kid about why she’s in that outfit?' Tell them that a giant slug captured me and forced me to wear that stupid outfit, and then I killed him because I didn’t like it. And then I took it off. Backstage." -Carrie Fisher.
Great response from Ms. Fisher. I mean, yeah, that's the most straight forward answer there is. That was the whole concept of that sequence, so why it is so hard to explain to little girls? Even I explained to my 6 and 7 year old girl cousins that the whole reasoning behind that bikini was that it's what Jabba makes his women wear and she had to do it or else he would hurt Han and Chewie if she didn't. I understood that reasoning.
PS: Disney Princesses in metal bikinis ... so damn hot!