ive seen some decent lacey thongs for men, in a few different styles. some more traditional with what comes to mind for 'lace' and some not. i have one that's like, a leopard lace? as a fabric, i love lace. and some types of mesh, especially large woven types sort of overlap with lace.
i dont like them if there's also frills or garter type straps, but i can see how those are sexy for the right people and i'd be down for my husband to wear anything skimpy, but for me i like them more simple. i dont mind floral, and i dont mind 'bumpy' design based edges over seam covered elastic.
to me, as long as it has a good pouch, narrow sides, a comfortable rear strap, and nice colors, im happy to have more in new fabrics.
example: one site of man i LOOOOVE Bodyaware and some of their styles [gossamer, silk, satin thongs].
https://bodyaware.com/ and while i wouldnt shop at their sister site x-dress first, i am so down for some of their more simple styles.
https://xdress.com/ nothing wrong with being femme with thongs or lace, and again i don't claim to be part of the community this site caters to, but sifting through i'll find a few things i really like, for example their satin thong and lace brazil, yassssss.