I agree. Its the thought of a nipple or pussy slip in the micro bikini that is so arousing

Adjustable
 

My wife wears a string micro that she can vary the width of each part. She chooses how much tit, butt crack, and lip she wants to expose, simply by varying the width of each panel. Depending on the situation she can narrow the fabric all the way down to barely covering her nipples, and tucking the lower part into her slit so that her lips show. Better than nude! Or, she can spread the panels to look like a modest bikini.

Sounds interesting, would you/she be willing to share pics?

Pool
 

Bought my wife a micro bikini for our recent holiday. She was reluctant to wear it at first but eventually did on a trip to a quiet beach where there was no one around.

Best bit is that we went to pool on the way back and she forgot she had it on. The pool was packed and everyone got to see her big curvy ass fully on show and up close.

100% lol!

When someone wears a bikini at the nude beach, it's fuel for the imagination:
"Ooh...she's got a bikini. I wonder if she'll take it off. Will she take it off by sliding it off while sitting down; or will she be brave and do it standing up? I wonder if she's totally bald or just trimmed? I can't wait to find out!"

When completely naked, all the intel is gathered at first sight and people are then quick to move on. My wife figured this out pretty quickly at the nudist resort and stopped wearing a cover-up when she realized her constant nipslips were providing entertainment for the male attendees.

My woman will wear a micro bikini to a beach, lake or to an event. The weekend before last she wore a micro bikini to a casino pool party. this past weekend she wore a micro bikini to this hotel pool. I took this picture of her as we walked to the pool.

Why is there a multi-billon dollar erotic lingerie industry?
 

Erotic lingerie and swimwear deliberately draws attention to certain parts of the body, usually by teasing concealment and sometimes deliberate exposure of those parts while hiding everything else.
Most of the photos of swingers events I've seen, show the women in some type of minimal clothing eg micro bikini.
If simple nudity was the most erotic visual stimulus then there would be no erotic lingerie industry.

If we are at a nude beach then my wife is naked as she loves to be nude and I enjoy showing her off. If we are at a regular beach or pool then she is in a micro bikini. At this time she only has one bikini that is not a thong or g-string which covers about half of her ass and that is the bikini she uses if she is around her family. If there is no family around then she will be in a micro bikini with her whole ass on display. Also as a bonus the part going into her ass crack is always a string so when she bends over you can see a good amount of her asshole showing behind the string.

Yes, my wife's suit is like that--just a string underneath, so when she bends over you see from her asshole to about 4 cm up her slit before the string attaches to the fabric in front.

Same with my wife. When she bends over the string runs from her asshole to about 4cm up her slit, where the string connects to the front panel of the bikini bottom. Sometimes it's loose enough that you see the entire slit all the way to where the lips join at the top. The view is upside down, of course, so it takes a moment to process what you're seeing.

By the way, she says she likes suits that pass only a string underneath because any leaking doesn't show, it just drips away, and also she likes the feeling of air down there.