I got a couple of Jack Adams “Bondi” thongs several years back to wear under wetsuits because (1) board shorts are terrible under wetsuits and (2) I always felt like I was at risk of someone complaining about me when I was changing since the sensible alternative is going commando.
Then I realized, nobody much cares what I’m wearing and honestly, thongs are just the right tool for the job at the beach. I’ll wear the more “modest” Jack Adams when I’m checking out a new beach, then switch to the slightly smaller Skinz M67 once it seems like that beach is ok with a guy in a thong.