Women's lib is all about CHOICE. I'm not sure this enters into the question, but I do agree that we all have to accept responsibility for ourselves.
If guys get turned on seeing a girl, guess what? They get turned on seeing girls fully clothed. And they are still responsible for however *they* choose to act on those feelings.
And teen girls will try to 'act sexy', if that's their thing, in a full-length dress with a high collar. Don't think they didn't do it in the 1800's! I'm not sure a different swimsuit is going to curb the behavior.
I thought a lot about the bikini question. When I was in Brazil, 14 years old and visiting during Carnaval, I was given a one-piece to wear on the beach.
The hooks were so flimsy, the top fell down. Boobs on the beach.
No one cared, and any tourist out there was busy looking at the pregnant lady floating topless amongst the waves.
For a while after that, I wore a string bikini and nothing was thought of it. At least my top didn't fall off. When I came back to the states, I wore it in the backyard, but not in the front. NOT around adult male family members. I had a bandeau top bikini afterward for a long time.
You have to understand, too, I grew up in Honolulu when I was young. Bikinis, to me, were about comfort. These days, I'm more comfortable in a tankini than a tank suit. I'm forty, though.
In my opinion, a midriff isn't a big deal. I wonder about the idea that a girl is somehow considered trashy or 'less' because of her clothing. Shouldn't that be based more on how she comports herself than what she wears?