Marina Sirtis' memories of Troi's non-standard uniform
But crucially, not by anyone in the main male cast. They threw a few skants on to a couple of male extras to forestall accusations of sexism. A figurative (and and near literal) figleaf.
Frankly, a unisex, utilitarian kilt would probably have worked a lot better for gals and guys, but someone got greedy for “underbutt” and ended up with an outfit so disliked that it was quickly phased out.