I have some information about your comment: "And yet thong-back leos for men are pretty rare, especially if you want one with short sleeves instead of a tank top."
I've found that at nydancewear they will "custom" order a thong back on any leotard, for a couple extra bucks. I think it's worth it. But they do have, in their regular catalogue, a men's Bal-togs leotard with short sleeves and a thong back -- I have two of them. Probably anyone who carries Bal-togs can get a thong-backed short-sleeved leotard.
I used to have a seamstress that would take in the back to a thong. This is also an option.
As I said below, I think this look is hot. It was popular when I was in California, and I'd like to see it more around the country!
Keep dancing (in style)! BalletMaster[/i]