I've just spent the late afternoon and evening at Palm Spring in Parakai, New Zealand.  I was in a micro teardrop gstring, metallic red with 2mm wide strings, it doesn't cover much at the best of times but the hot water seemed to shrink it a bit more.  It must have been the smallest bit of swimwear people had ever seen on a guy.

The owners didn't bat an eyelid, they run monthly nude nights, I'll have to attend one of those.  The place was quiet, very few people there and the atmosphere was relaxed.  Nobody commented on my attire, even when I walked up to the counter to order a cold beer and a hamburger.

The best experience I've had wearing the same gstring was having a break from kayaking at a little bay on the Coromandel.  While enjoying a cold beer and the hot sun a woman had walked the trail to the beach to do the tourist thing.  She sat on the rocks at the end of the beach for a while then came over towards me.  At this point, she still hadn't seen the front of the suit and she must have assumed it was a reasonably modest gstring.

She approached and said "Excuse me, hello", I turned and returned the greeting.  She lost her voice for a second then said "Wow!, that doesn't cover hardly anything!" but didn't seem offended.  She then asked me to take her photo, I took several, she never asked for a photo of me.  We chatted on the beach for about 10 minutes.  Nothing else happened, it was simply a pleasant chat with a Canadian backpacker of the opposite sex.  I hope I left her with a pleasant memory of NZ whenever she looks at the photos I took.

Cheers