Crochet shorts
I had a neighbor that would wear a crochet bikini top and Daisy Dukes when she did yard work out front. She came to our door one day to give us some flowers from her yard. When I answered the door, she was standing there with flowers in her hands and her nipples poking through the crochet bikini. She had no clue, and was probably drunk.
I tried the crochet bikinis with my wife, too. No luck. :-( None were open enough let the nipples poke through (or show anything that may lead to an arrest on a textile beach) but one had an open weave on with side of each panel with only a narrow strip of dense weave. I thought it was a great look.
When I see those open-weave designs my inner pedant starts counting the holes to determine if symmetry is maintained in where parts poke through!