I'm a straight female, turning 30 in less than a month, never married, and don't have any kind of fetish/kink for cross-dressing men. (So those are the stats for reference
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It wouldn't be a big deal to me if I had a husband/boyfriend wearing them for comfort reasons, like silky materials being more comfortable or lightweight. I'd only end up suggesting something like that if he would comment/complain about having uncomfortable underwear, or looking for a cooler option for working in the heat or something.
A similar example, by my thinking, would be any gender using vaginal creams (they have numbing/anti-itch ingredients) to stop itching from poison ivy or bug bites or whatever. As in, originally for one gender/sex, but has other effective purposes.
I think the lacy underwear might be more intended to be a sexy/sexual thing, and it seems to be getting into cross-dresser territory.